How to choose the telephoto lens of the camera

Answer 1

When choosing a telephoto lens for a camera, many factors needed to be considered.

First of all, it was necessary to make clear the purpose of buying a telephoto lens, whether it was used to shoot portraits, scenery, or other specific scenes. There were four common types of telephoto lenses: medium telephoto lenses (such as 70 - 200mm), telephoto to super telephoto zoom lenses (such as 70 - 300mm, 200 - 400mm, 100 - 400mm, etc.), and fully fixed-focus super telephoto lenses (such as 500mm, 600mm, 800mm). Different types had different usage opportunities and preferences.

If it was just to gather the focal length, 70 - 200mm or 70 - 300mm was usually enough. The image quality of 70 - 200mm was better than 70 - 300mm, but the price was relatively higher. When choosing between these two lenses, one also had to consider the zooming ratio in the photography industry. The image quality of a lens with a zooming ratio of less than three times was relatively good. For example, the zooming ratio of a 70 - 200mm lens was about 2.9, which was within three times, while the zooming ratio of a 70 - 300mm lens was greater than three times.

For special shooting needs, if long-distance shots were often needed, such as shooting birds, taking photos in places such as the Kenyan grasslands, etc., lenses such as 100 - 400mm, 200 - 400mm, and 100 - 500mm were more suitable.

In terms of brand and model, users of different brands had different recommendations. For Canon users, whether it was F2.8 or F4, they should buy lenses with IS (anti-shake function) as much as possible. If the budget is sufficient, you can choose Love Xiao-White Bunny; if the budget is limited, you can consider the second-hand Xiao-Xiaobai; if you are conflicted between Love Xiao-Xiaobai and Little White, you can choose according to the use and weight. Love Xiao-Xiaobai is lighter, so you can choose it if you take more photos. If you were to use the Eos R system, the RF70 - 200mm F4LIS USM was a good choice. It was shorter than the EP version and lighter. For Nikon users, the electromagnetic pulse cannon would be the priority. If the budget was not enough, the Tenglong lens could be considered. However, the SP 70 - 200mm F2.8 Di VCUSD G2 should be chosen. For the users of the company, I recommend the F70 - 200mm F2.8 GM OSS II. In addition, when choosing between the original PE 70 - 200mm F4G OSS and the Tenglong 70 - 180mm F2.8 Di III VXD, the original Sony-made lens had been on the market for a long time, and the performance under the F4 aperture was not much different from the performance under the Tenglong F2.8 aperture. Only the internal zoom had an advantage, so the Tenglong lens was more recommended.

When comparing the 70 - 200mm and 100 - 400mm focal length lenses, the large aperture of 70 - 200mm was better than 100 - 400mm in low-light environments, and it was more suitable for shooting portraits and more suitable for scenes;100 - 400mm could be positioned as a landscape lens, which was also suitable for travel shooting, but the disadvantage was that it was larger in size and weight. If you want to expand the focal length, you can use a combination of 100 - 400mm +85mm fixed-focus or 70 - 200mm + distance-increasing lens.

At the same time, factors such as the weight of the lens and its maneuverability should also be considered. For example, the 70 - 200mm F4 may be more suitable because the new models of various brands have optimized image quality and focus, and the lens is more portable than the F2.8 large aperture model with the same bayonet.
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