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The difference between camera lenses

The difference between camera lenses

2026-07-03 04:34
1 answer

There were many ways to differentiate between camera lenses. The following are the differences in different aspects: ** I. By focal length ** 1. ** Fisheye lens ** - The focal length range is usually 7.5 - 13 mm. The angle of view was very large, and it could shoot special circular or extremely exaggerated effects. The depth of field was long, and it could make the proportion of the near, big, far, and small of the deep scene strong. The image had a strong sense of perspective, but the image distortion was large, especially at the edge of the image. When shooting at close range, the distortion was obvious. 2. ** Super wide-angle lens ** - The focal length was between 17 - 24 mm. It had the characteristics of a large angle of view and a large depth of field, which was beneficial for shooting a wide scene in a narrow environment. It could clearly show the subject with a large depth, but there was also the problem of large distortion at the edge of the image. 3. ** Wide-angle lens ** - 28 - 35mm focal length. Compared to the super wide-angle lens, the angle of view was slightly smaller and the depth of field was larger. It could be used for shooting a variety of scenes, but there might be some image distortion at the edge of the picture. 4. ** Standard Shot ** - The focal length is 45 - 58mm (usually 50mm). Its angle of view was similar to that of the human eye (about 50 degrees), and the image quality was relatively high. It was widely used in various types of photography and had strong adaptability. 5. ** Medium and long focal length lens ** - 80 - 135mm focal length. This focal length was more commonly used in portrait photography. It could use perspective distortion to produce special effects. 6. ** Long focal length lens ** - Like 200mm, 300mm, 500mm, etc. The depth of field was small, which was conducive to capturing the image of the combination of virtual and real; the angle of view was small, which could capture a large image of the scene from a long distance, suitable for shooting objects that were not easy to approach, and the perspective relationship was greatly compressed. The image distortion was small, and it performed well in portrait photography. 7. ** Ultra-long focal length lens ** - 1000mm focal length and above. It could be used to shoot objects from extremely far away. ** 2. Sorting by whether the focal length can be changed ** 1. ** Fixed focus lens ** - The focal length of a fixed-focus lens was fixed. At the same level of technology, the image quality of a fixed-focus lens was often better than a zoom lens. For example, an 85mm fixed-focus lens was used by many professional photographers for portrait photography. Its image quality was basically the ceiling of the image quality of various lenses. 2. ** Zooming lens ** - The focal length of the lens could be freely adjusted within a large range, such as a 24 - 105mm zoom lens. However, under the same quality and technical level, its image quality was worse than that of a fixed-focus lens. ** 3. By Aperture (Aperture)** 1. ** Large-caliber lens ** - The maximum relative aperture (maximum aperture) was F1.0, F1.2, F1.4, F1.7, F1.8, F2.0, F2.8, etc. A large aperture lens had the advantage of shooting in dimly lit environments, and it could obtain a shallow depth of field, making the background blur effect better. 2. ** Medium-caliber lens ** - The maximum aperture was F3.5, F4.5, F5.6, etc. 3. ** Small Aperture Shot ** - The maximum aperture was below F8. Read more exciting novels for free

Trapped Between Two Alphas

Trapped Between Two Alphas

"What's that?" I whispered to myself as I felt something moved very fast behind me. It was very dark at night and a dim-lighted lamp was the only source of light I had to see my way home! "Oh my God!! What could that be?" I whispered to myself again as it moved again, this time, I felt it getting closer to me. Suddenly, I heard a soft whisper close to my left ear "she's back and will spare no one". I became more terrified and decided to run. As I was running, I felt that something was running after me, something I couldn't see. Suddenly, my foot hit a stone on the ground and I fell down with a loud thud, shattering the only source of light I had to pieces! And as I was trying slowly to get back to my feet, I was startled by what I perceived in my nostrils. It was as if what was chasing me was right before my face but yet, I couldn't see it, I could only perceive the smell of warm human blood! ****** On her 18th birthday, Katerina Bathas expected a miracle. Instead, she got a death sentence. Her fated mate, the cruel and powerful Alpha Kol Night, rejected her in front of the entire pack, calling her "unworthy" and "disgusting." Broken and maltreated by Ace, her own brother, on the basis that she was believed to have killed their parents, Katerina flees into the wilderness, choosing the life of a Rogue over a lifetime of shame. But the girl who left the Fallen Moon Pack isn't the woman who returns. Rescued by the mysterious Untamed Pack, Katerina undergoes a lethal transformation. Now, Kol is back, haunted by the bond he tried to break and desperate to reclaim what he threw away. Caught in a deadly tug-of-war between two Alphas, Katerina must decide: Will she return to the mate who shattered her, or surrender to the Alpha who saved her—even if his love is built on a lie? And oh, who is this third Alpha claiming to be her mate as well?
Fantasy
761 Chs
Pillow of Hearts: A tale between the warm hug and cold coffee

Pillow of Hearts: A tale between the warm hug and cold coffee

Moon Young Jae’s homophobic family considered him a disgrace and held his freedom in their clutch. Even with being obedient, he was not free from their abuse. Young Jae was almost blinded and crippled by his father when he stood up for himself for the first time. Left to bleed and die, luckily, he did have a family who wanted to save him. It was twin cousins, who were disowned long before him, who saved him. Sad and hopeless, Young Jae became curious when he met his cousins’ friend, who understood him better than anyone, even without words. Curiosity got the best of him, and he ended by handing his heart, love and soul over a plater as a price. Slowly, Young Jae fell in love with everything about and around Min Jun and eventually fell for the man. Calculative Wang Min Jun entered Young Jae’s life accidentally. He challenged Young Jae's belief with a warm smile and flipped Young Jae’s world upside down. Min Jun read Young Jae like an open book. He planned to get over the little crush he had on his seniors' cousin brother but failed miserably. Min Jun did not like the often-visited ‘frown’ between those beautiful eyebrows and even the always singing of ‘sigh’ through those sinful lips. Min Jun made it his mission to change it only to fall for everything about Young Jae. Wang Min Jun carried his share of baggage, but he was well-prepared to meet the demons from the past head-on. But Young Jae became a mess whenever his past demons decided to pay a visit. He realised he did not have to face anything alone as he has a wonderful boyfriend who cherishes everything about him. Both faced their past demons and trauma together. When a person betrayed by a family fell in love with a person who holds his family above everything, sparks flew, and hearts soared in happiness. Will their story has a harmonious bell, or would it be a sea of misery? Teaser: Files were shattered all over Min Jun’s bed, and his laptop was placed on the bedside table. It chimed once in a while, indicating a new email for him to check. The work was piling more and more as he was diligently finishing it. Young Jae walked into his boyfriend’s bedroom to witness his handsome lover working hard. "Jun Jun! Are you busy?" Even though Young Jae did not want to disturb his lover, he knew he needed some help to impress his boss. "Never for you, love. Tell you what you need?" Min Jun did not lift his head from the file he was going through, but the warmth in his voice reached Young Jae's heart without fail. "Do you have a minute to help me in reviewing my monthly internship report? I have to present to our boss tomorrow morning." Young Jae pouted as he asked. Min Ju looked at his adorable tokki and smiled mischievously. "You are brave, asking your superior to help you sneakily. I can't do it for free. I need a huge bribe to help you. What are you planning to offer?" "Be serious. You have too much work to do." Young Jae chided his shameless boyfriend, who never failed to seize every opportunity to make him moan and groan as he takes him to the pleasurable heaven. "Exactly. I have too much work to do. If I am taking my time to help you, I need something in return. Something so tempting that I don’t mind cramping lots of things later." Min Jun smiled like a devil he was as he grabbed Young Jae towards him. The little rabbit who fell into the cunning wolf's lap did not even get a chance to protest as he was devoured breathlessly. Young Jae forgot why he entered the wolf's lair altogether. Min Jun pushed the files away to make space for his little rabbit to lay down comfortably. Young Jae’s report was long forgotten as a treacherous hand started to caress him again under the shirt as a sinful sound filled the room. P.s: The cover belongs to the rightful owner, and it will be removed if the original owner asks to do so. WARNING: THIS IS A GAY LOVE STORY WITH BDSM. IF YOU ARE NOT COMFORTABLE WITH IT, SPARE THE NOVEL. Discord: https://discord.gg/jSQxjwPV5s
LGBT+
583 Chs
Alpha's Bite Between My Legs

Alpha's Bite Between My Legs

[ WARNING: EXTREMELY MATURE CONTENT ] "If I see you again, I'll ravish your body while you bleed, Prince!" Rosina, a woman haunted by a dark past, developed a dangerous obsession that led to a trail of blood and corpses. A predator that liked to enjoy her prey before taking their lives. She has always despised the idea of having a mate until she was compelled to attend the annual mating season. Harboring a deep desire for freedom, she detested any association with royalty. During the mating event, she encountered a mysterious man wearing a blood-red mask. Draco was portrayed as a carefree Third Prince who sought only amusement and avoided the responsibilities that came with the crown. However, his encounter with Rosina ignited a change within him. He realizes that in order to win her hand in marriage, he must become a King. That transformation set Draco on a path of self-discovery and growth as he strived to prove himself worthy of Rosina's love. Would their encounter change their fate or push them to ruin? _____ Volume 2: "My duty is to find a nobleman to lead my Pack, but you conquered my heart, commoner." Felissa was responsible for searching for a mate worthy of status and fulfilling her duty as the only daughter of an Alpha, which led her to revolve her life to become a perfect future Luna of the Midnight pack. She was known as gentle as a fragile flower, or so they thought. Behind her cheerful smile hid the darkness that wanted to ascend and take over her body. A personality born due to the use of magic. As Felissa hunted for a noble mate to satisfy her parents. She met a commoner with two identities. Vicenzo was a man living different lives to keep his mother safe from the abusive Pack. He was willing to sacrifice the mate bond to destroy the New Monarch as his task, but his heart slowly broke apart and yearned for his mate's touch. Would they prioritize their duty or give in to what their body desired?" _____ Volume 3: "I will accept you despite everything you have done, my dearest." Gastone lived in the human world as his punishment but was called back to the Werewolf realm by Rosina to find his mate. He didn't want one because of his living situation and pride as a fallen Prince. Along the way, he saved a troubled woman named Lucia and brought her to the realm after begging him to save her. That caused problems since Werewolves were myths to humans. With the help of Draco, Gastone and Lucia settled in a secluded place temporarily for security. Lucia had escaped from the Orphanage that worked in the black market. She aimed to stop its business to save many girl's lives but failed after years of planning. After meeting Gastone, she intended to use him to her advantage since she needed milk to survive the curse. Would their love blossom after finding great differences between their races? __ [ WPC #301 - Gold Place Winner!!! ] . . Official Commissioned Cover. __ Contact me: IG: mona_milku Discord: https://discord.gg/XqbVZffGbv __
Fantasy
550 Chs

Buy camera lenses online

If you buy a camera lens online, there are a few things to consider: ** 1. Selection of camera type ** 1. ** Focus ** - For beginners, they might prefer to choose a wide-angle lens to obtain a wider field of view, but they should be aware that wide-angle lenses may have problems with the image change and the perspective relationship. The telephoto lens was more useful in landscape shooting than wide-angle shooting, and it could also take into account the shooting of skits and portraits. - For portraits, the commonly used focal lengths were 35mm (suitable for environmental portraits), 50mm (can be advanced or retreated, and can handle both indoors and outdoors), 85mm (very useful for shooting half-length portraits and close-ups, known as the golden focal length for shooting people), and 135mm (suitable for close-ups of people, which can separate people from the background well). - Tianya Mirror (such as Tenglong 50 - 400mm, Nikon Z24 - 200mm, Tenglong 50 - 300mm) is suitable for people who pursue lightness and practicality. It has the characteristics of lightweight and wide focal length coverage (from wide-angle to telephoto), but it is not recommended if you are pursuing the ultimate image quality and performance. 2. ** Fixed focus and zooming option ** - The quality of the fixed-focus lens was better than that of the zoom lens, but the composition needed to be adjusted by moving the position (fixed-focus depended on walking). If the requirements for image quality were high, such as when shooting portraits, the fixed-focus lens would be given priority. It could provide better image quality and blurring effects. - The zoom lens was more convenient to use. By adjusting the focal length of the lens, the image could be changed (zooming depended on the hand). It was suitable for traveling, sweeping the streets, and other situations. It could shoot more content of different topics. ** 2. Price related ** 1. ** Hedging Rate ** - You could consider buying lenses that had a high rate of preservation and were easy to resell, especially if you planned to resell the lenses in a year or two. 2. ** Promotions and Price Fluctuations ** - During a shopping festival like the 11/11 event, the price of some lenses might not be really discounted. There might be price fluctuations, rising first and then falling, or no price reduction at all. For example, Canon's RF28 - 70mm F2.8 lens was priced higher than the official website's recommended price during the Double 11 period, and the price fluctuated. However, there were also some photography equipment, such as Canon R6 II, Nikon Z6 II, Canon R5 II, and SonyA7C II. The prices of various brands of lenses and high-end high-intensity fixed-focus lenses were relatively stable. The price of the last generation of single-lens reflex models was also relatively affordable. ** 3. Evaluation of lens performance ** - Different lenses had different image quality. For example, Canon's RF28 - 70mm F2.8 lens had average image quality and even slightly exceeded the positioning of the silver ring lens. It also had anti-shake function. When choosing, you can refer to some lens evaluation materials or feedback from other users to evaluate the actual performance of the lens. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>

1 answer
2026-07-01 05:23

How can camera lenses tell a story?

Well, camera lenses tell a story through their ability to control light and shadow. They can create a mood, emphasize certain elements, and guide the viewer's attention. Also, the choice of focal length can show relationships between characters or objects in the scene.

1 answer
2024-10-14 02:50

The difference between a single camera and a dual camera

In photography, there were many differences between a single camera and a dual camera. 1. ** Number of Equipment and Personnel ** - Single-player: It meant that each machine was equipped with a filming assistant. - Dual-machine: Two machines and two cameramen. 2. ** Shooting Range ** - Single camera: The photographer basically followed the newlyweds throughout the entire process and focused on recording the wedding process. The lens was relatively single. For example, on the day of the wedding, they might only be able to record the bride's side of the scene or go to the groom's house to record the groom's situation after recording the bride's makeup. The groom's preparation process might not be able to be filmed, and it was easy to miss some exciting scenes. In a crowded or chaotic scene, it was difficult to take care of all the content that needed to be filmed, and the number of guests captured would be relatively less. - Two cameras: one camera with the bride, one camera with the groom, the main camera recording the entire process, the secondary camera depicting the details. When there were too many people or chaos, the two cameras could complement each other. For example, when the newcomer spoke, the host camera would be with the newcomer, and the secondary camera would be with the parents. Moreover, it could take into account more guests 'shots at the same time, and the shooting content would be richer. It could show the wedding scene in all directions. 3. ** Ability to respond to unexpected situations ** - Single unit: If the machine fails during the filming process, there may be no backup equipment and personnel to supplement, which may cause some scenes to be lost. - Dual-machine: Even if one machine breaks down, there is another machine that can continue to shoot, reducing the impact of unexpected situations on the shooting results. 4. ** Shooting Material Volume and Post-editing ** - Single-player: The shooting material is relatively small, which may increase the difficulty of post-editing and affect the quality of the final edited product. Because the available material is limited, the expression and visual impact of the picture are relatively dull. - Dual-camera: Two cameras can shoot more material, which can provide more choices for post-editing. It helps to produce a finished video that better shows and maintains the situation of the wedding day. 5. ** In terms of fees ** - Single machine: Due to the low investment in equipment and personnel, the cost is lower than that of dual machines. - Dual-machine: Dual-machine requires more equipment and labor costs, and the price is usually higher than a single machine. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>

1 answer
2026-07-03 02:31

Is there a significant difference between a cartoon camera and a regular camera?

There's a big difference. Cartoon cameras are usually designed for creating fun and stylized images, while regular cameras focus on capturing real-life scenes accurately.

2 answers
2025-06-10 03:56

What lenses do I need to buy for my first camera?

For users who bought a camera lens for the first time, if they were novices, the wide-angle lens might be the priority because it had a large viewing range and could shoot an imposing and comprehensive picture. However, there were also drawbacks such as small changes in the picture and difficulty for novices to grasp the perspective relationship. However, from another point of view, the telephoto lens was more useful than the wide-angle lens when shooting scenery. It was more commonly used and could also take into account topics such as skits and portraits. The choice of fixed-focus and zoom lenses depended on the needs of the user and the subject. The fixed-focus lens had better image quality. If you were shooting a portrait, you would give priority to the fixed-focus lens to get better image quality and blurring effects. The zoom lens was more convenient to use. If you were traveling or sweeping the streets, it was better to carry the zoom lens and shoot more subjects. If you want to be light and practical, a large zoom Tianya mirror is a good choice, such as the Tenglong 50 - 400mm, Nikon Z24 - 200mm, Tenglong 50 - 300mm, etc. In addition, in portrait photography, the commonly used focal lengths were 35mm, 50mm, 85mm, and 135mm. From a practical point of view, 50mm and 85mm lenses could be chosen first. 50mm lenses could be used indoors and outdoors. 85mm was the golden focal length for shooting people, suitable for shooting half-body portraits and close-ups; 35mm was suitable for environmental portraits, which could combine people and scenes well; 135mm was suitable for close-ups of people. A long focal length with a large aperture could get a good sense of " space cutting." <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>

1 answer
2026-07-02 19:07

What's the difference between domestic micro-lenses?

There were many differences between domestic micro-lenses: ** 1. Price ** 1. ** Low-priced and affordable ** - Some of Yongnuo's lenses were more affordable, such as 35F2, 501.8, 851.8, etc., especially Yongnuo 501.8, which used to be sold for a few hundred yuan. It was a good choice for users with a small budget. - ttArtisan 56mm F1.8 was priced at 867 yuan, which was relatively cheap and guaranteed basic image quality. 2. ** Mid-priced model ** - The 33F1.2 Sniper Series was priced at 1599 yuan. - Some of Vizos 'lenses were in the middle of the price range. For example, the 85mm F1.8Z was priced at 2299 yuan, and the 24mm F1.8 was priced at 2499 yuan. 3. ** Higher Price Type ** - The Meike 851.4 full-frame lens was priced at around 2880 yuan. - The price of the Vizos 75mm 1.2 half-frame lens was 3500 yuan. ** 2. Focus Section ** 1. ** Standard focal length ** - Yongnuo had 35F2, 501.8, 851.8 and other lenses that covered the standard portrait focal length. - Vizos also had 161.8, 241.8, 351.8, 501.8, and 851.8 full-frame lenses that covered mainstream portrait focal lengths. The 231.4, 331.4, 561.4, and 131.4 fixed-focus lenses under the APS-C frame were equivalent to 20, 35, 50, and 85 focal lengths for the full-frame. - The Si Rui Sniper series had lenses that corresponded to the classic focal lengths of 35, 50, and 85. 2. ** Special focal length ** - The Si Rui Sniper series had a 23mm focal length lens, and its full aperture was very shocking. However, this focal length did not have ED lenses, but were all high-refraction lenses. ** 3. Performance ** 1. ** Dispersion Control ** - The Si Rui Sniper series still had room for improvement in controlling the dispersion, but the Meike 851.4 used an ED lens to effectively control the dispersion. - Some of Vizos 'lenses also had good dispersion control capabilities, such as some of its lenses equipped with ED dispersion lenses. 2. ** Automatic Focus Ability ** - Vizos was more successful in autofocus. It had introduced autofocus lenses with multiple portrait focal lengths, such as 161.8, 241.8, 351.8, 501.8, 851.8, etc. - Previously, there were 7 - 8 sub-factory lens brands of Nikon Z-mount, but none of them supported autofocus until Vizos launched the first sub-factory Z-mount lens that supported autofocus. 3. ** Image Quality ** - The 56mm F1.8 of the ttartisan could guarantee the basic picture quality. Some lenses such as 161.8 and 241.8 could also be used to shoot the Milky Way, which had better picture quality. - Judging from MTF, the Vizos Z-mount 24mm F1.8 image quality might not have high expectations. ** 4. Appearance and material ** 1. ** Material ** - Yongnuo's different lens models were made of different materials. For example, the 85mm lens barrel was made of a high molecular material, and the front end of the rubber focusing ring was made of a high molecular material. The 35mm lens barrel was made of an aluminum alloy material, and the 42.5mm lens was made of a high molecular material. 2. ** Exterior design ** - Different brands of lenses had different designs. For example, in terms of the process of the lens logo, the Yongnuo 85mm product information was marked with a gray layer on the lens barrel, while the 35mm lens used the anodisation process and the font was engraved with laser engraving. - There were also opinions that some domestic lenses still had room for improvement in terms of appearance design, such as the shape of the lens and the design of the LOGO. For example, Wei Zhuoshi was suggested to make the lens design more beautiful, and the logo could be re-designed. ** 5. Focus on the picture frame ** 1. ** Full-frame shot ** - Meike 851.4 was a full-frame lens. Yongnuo, Vizos, and other brands also launched full-frame lenses, such as Yongnuo's 35F2, 501.8, 851.8 (there were Sony E-ports and Nikon Z-ports, etc.), and Vizos '161.8, 241.8, 351.8, 501.8, 851.8, etc. 2. ** Half frame shot ** - The 56mm F1.8 of the ttArtisan was a half-frame lens, while the Vizos also had 231.4, 331.4, 561.4, and 131.4 fixed-focus lenses under the APS-C format. Yongnuo also had the 501.8 half-frame lenses with the Sony-mount. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>

1 answer
2026-07-02 12:30

Is there a difference in the size of the surveillance camera lens

There was a difference in the size of the surveillance cameras. Different sized lenses had different viewing angles and distances. Generally speaking, the smaller the millimeter of the lens, the larger the angle of the surveillance picture, but the clearer the distance. On the contrary, the larger the millimeter of the lens, the smaller the angle of the surveillance picture, and the clearer the distance. For example, the 2.8mm focal length lens has a large viewing angle, suitable for monitoring small spaces such as storage rooms within 3 meters; 4mm can be used for indoor environments such as living rooms and small shops; 6mm is suitable for small shops or doorways of 5 - 10m; 8mm is best for outdoor roads and alleys of 10 - 20m; 12mm is mainly used for specific locations such as entrances and exits of about 20 - 30m. In addition, from the relationship between angle and distance, the larger the angle, the closer the distance. For example, the 3.6mm lens was 67.4 degrees, and the distance was 15 meters; the 6mm lens was 42.3 degrees, and the distance was 20 meters; the 8mm lens was 32.6 degrees, and the distance was 25 meters; the 12mm lens was 22.1 degrees, and the distance was 40 meters; and the 16mm lens was 17.1 degrees, and the distance was 60 meters. The common surveillance camera lenses on the market were arranged according to the size of the frame: 2.8mm, 3.6mm, 4mm, 6mm, 8mm, 12mm, 16mm, 24mm, etc. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>

1 answer
2026-06-30 02:53

How many mm lenses do you usually use in your home camera?

For ordinary home use cameras, the following focal length lenses were more commonly used: - 35mm-50mm focal length: This focal length is close to the range of the human eye. Among them, the 35mm lens was suitable for shooting some daily scenes, such as family gatherings, indoor environments, etc., which could better capture the relationship between people and the environment; the 50mm lens was also known as the standard lens, which was often used for ordinary scenery, portrait shots, etc. The imaging effect was more natural, and in low light conditions, some 50mm fixed-focus lenses could provide a larger aperture, which could obtain better blurring effects. - 24mm-35mm focal length: It belongs to the range of wide-angle lenses and is suitable for taking photos of large scenes, such as the full view of a family home, the appearance of a building during tourism, etc. If the space in the house was small, the lens with this focal length could capture a wider picture within a limited distance. - 85mm focal length: Commonly used to shoot portraits. It can produce a moderate background blurring effect and highlight the main body of the character. When shooting family portraits, it can make the character more prominent, and the background is relatively blurred, thereby enhancing the artistic sense of the picture. In general, the choice of home lenses for cameras depended on the specific shooting needs, but the 35mm-50mm focal length was a more common choice. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>

1 answer
2026-07-02 22:52

What's the difference in the focus of the surveillance camera?

Surveillance cameras with different focal lengths had the following differences: ** 1. Range of view ** 1. ** The smaller the focal length ** - The larger the field of view. For example, a 4mm focal length camera had a wide field of view and could easily capture a large range of scenery. It was suitable for monitoring large areas such as parking lots and playgrounds. 2. ** The bigger the focal length ** - The smaller the field of view. Cameras with a focal length of 8mm had a relatively narrow field of view and were usually used for scenes that needed to focus on long-distance targets, such as traffic surveillance, wild animal photography, etc., but they were not suitable for large-scale surveillance. ** 2. Image Details ** 1. ** The smaller the focal length ** - There might be some sacrifices in the clarity and details of the picture. Although the camera with a 4mm focal length could capture more image information, it was average in terms of detail capture ability. It might need a higher resolution to make up for it. 2. ** The bigger the focal length ** - It could present a more detailed image effect and magnify distant objects to capture more detailed information. The 8mm focal length camera had a strong long-distance detail capture ability, but at the same time, it needed a higher resolution to ensure the clarity and details of the picture. ** 3. In terms of applicable scenarios ** 1. ** Small focal length ** - For situations where the monitoring range is small and the viewing angle is large, such as the living room of a family or a small shop, you can choose a surveillance camera with a smaller focal length (such as 3.6mm or 4mm focal length). The viewing angle can reach 75°-90 °, and the effective monitoring distance can reach more than 5 meters, covering 40 - 80 square meters of space. 2. ** Large focal length ** - For a large monitoring range (such as a space of more than 10m * 10m), you need to choose a surveillance camera with a larger focal length. If you want to capture detailed information from a distance, such as license plate numbers or facial features, an 8mm focal length camera is more suitable, while a 6mm focal length camera finds a more balanced point between field of view and clarity. It is suitable for home surveillance, small conference room recording, and other scenes. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>

1 answer
2026-06-30 22:46

The difference between a digital camera and an ordinary changeable lens

There were many differences between digital cameras, which included ordinary cameras with changeable lenses. ** 1. In terms of camera lens ** 1. ** Commonality of changing lenses ** - Most ordinary digital cameras couldn't change the lens. The lens was fixed to the body of the camera. - Digital cameras with changeable lenses (some special types) could change lenses to adapt to different shooting needs, such as different focal lengths and aperture requirements. 2. ** Relationship between autofocus system and lens ** - If the digital camera with an changeable lens uses the contrast focusing method (the focusing method of some digital cameras with changeable lenses), the focusing speed and accuracy may be affected, especially when the size of the sensor is large, it is easy to cause the bellows phenomenon (that is, the focus is moved back and forth to determine the focus position). - DSLR digital cameras (a typical type of digital camera with an interchangeable lens) mainly relied on phase difference AF-focusing, and there was a fundamental difference in autofocus performance from some digital cameras with an interchangeable lens. ** 2. Light-sensitive material ** 1. ** Photosensitive Material size ** - Ordinary digital cameras used a relatively small area of the CCD. - Most digital single-lens reflex cameras (also a type of camera that could change lenses) used two-thirds of the full-frame as a light-sensitive material. A few high-end products could achieve full-frame (the same size as 35mm film), and the area of the light-sensitive material was several times larger than that of ordinary digital cameras. 2. ** Image related performance ** - Due to the small size of the light-sensitive material, the noise control of ordinary digital cameras was poor. - Due to the large area of the light-sensitive material, DSLR cameras generally had very little noise. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>

1 answer
2026-07-01 13:09
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