What is the shooting effect of Canon's 2x rangefinder?

What is the shooting effect of Canon's 2x lens?

Canon's 2x telephoto lens effect is really average!

Everyone knows the function of rangefinder. The rangefinder has no advantages except increasing the focal length coefficient and price. Canon currently has 1.4xIII and 2xIII rangefinders to increase the focal length of the original lens! Taking 100mm focal length lens as an example, the ratio of 140mm or 200mm focal length lens can be produced. The main difference between the two rangefinders is the difference in permeability, image quality and focusing speed. The lower the multiple, the higher the picture quality! It is worth noting that the 2 times magnifying glass not only loses these things, but also loses the second aperture, and 1.4 loses the first aperture. The original telephoto lens has no advantage in permeability. What do you think of the effect of adding a sleeve? If the effect is the same as other super telephoto lenses, is it necessary to produce super telephoto lenses? A condom of more than 2000 is worth tens of thousands of lenses. Therefore, the relationship between image quality and price is equivalent.

Personal opinion: 2x rangefinder has no advantages except the longer focal length.

If the focal length with the highest cost performance is reasonable, I think the 1.4x magnification mirror is barely acceptable! If you think there is another way to solve the defect of focal length, get an aps fuselage and a magnifying glass of 1.4x with a medium telephoto lens to achieve the effect of super telephoto. This aps with Quan Huafu lens increases the coefficient of 1.6 (Canon 1.6 Nikon 1.5), plus the multiple of 1.4! The focal length of a 70-200 lens becomes 157-448, which is much better than a 2x rangefinder with Quan Huafu lens in terms of image quality, aperture influence and focusing speed. This is also the most economical and effective method!

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Perhaps the biggest advantage of rangefinder is that most people will understand the way to increase the focal length in order to save the most money, but for professional photography, the effect of Quan Huafu lens with a cost of ten thousand yuan has lost its original meaning. This way of saving money has been in vain! Therefore, we should make rational use of photographic knowledge to achieve the best results.

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