People often say “Wen is not the first and Wu is the second.” Although there are many interpretations of this sentence, one of the meanings is consistent with this question, that is, there is a standard for some things in the world. High and low can be distinguished, but there is no uniform standard for many things, and the one that best meets our own needs is the best.
The same is true for the lens. The so-called existence is reasonable, although we often say “Dog will win over cattle change”, but this is only an evaluation made from the aspect of lens quality, and factors such as price, focal length, volume, etc. are first put aside. Under such circumstances, this sentence is naturally valid. Yes, if you want the same high image quality, the design difficulty of a zoom lens is much greater than that of a fixed focus lens. In addition, the larger the zoom factor, the more complex the lens composition and the worse the imaging, and there is no guarantee that it will be in each focal length. It has the same level of image quality performance, so there is a saying that the zoom is not as good as the ordinary fixed focus.
However, in actual use, we can’t just look at the image quality. One item, the price, focal length, volume and other factors all need to be considered, as well as whether the shooting scene is convenient to change the lens, whether it can be composed by moving the position, etc., so it is obvious that the quality of a lens is evaluated simply from the image quality. It is biased.
The most important thing is that the times are also advancing, with With the development of technology, more and more good equipment will appear. Just like before, we do not recommend everyone to buy a large-magnification zoom lens, but now with the advent of the era of mirrorless, large-zoom lenses have also achieved a better balance between image quality and price, such as RF24-240mm f/4-6.3 IS USM’s 10x zoom Tianya lens has far superior performance to similar SLR large zoom lenses. Another example is the “dog wins over the cow”, but the RF28-70mm F2 L USM lens maintains excellent image quality in all focal lengths of the zoom. It is said to be a collection of multiple fixed-focus lenses. It’s not an exaggeration, and without considering the cost, volume and other issues, we really can’t seem to find a reason why it is inferior to ordinary prime lenses.
So it’s actually a good zoom lens or a prime lens. False proposition, we should choose the right lens according to our shooting needs. Whether it is a zoom or fixed focus lens, what you value most is the price, size or image quality of the lens. Only the lens that suits you is the best.
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