CRP
The Sony SEL1635GM is an excellent lens, providing sharpness across the frame and fast autofocus, it is not without its quirks however. The telescopic reverse-zoom takes some getting used to (the camera extends out as you twist its ring clockwise and in doing so the field of view becomes wider; this is the opposite of a typical telephoto lens that initially twists counter-clockwise and extends to zoom in). Again, this is nothing more than a quirk to become accustom to. The only other negative is it’s si and weight. Though not terribly large or heavy relative to its peers this lens is substantial and when paired with the a7R III is most definitely noticeable when out as a travel photographer. In the end these are minor concessions in order to have such a quality lens. Precise focusing, sharp, zero chromatic aberration (a truly impressive achievement), this lens is likely the only wide-angle lens a travel photographer will need. The added bonus of an 82mm filter thread for polarizing or ND filters is a welcome benefit for those shots that photo editing software just can’t replicate. Buy with confidence (but stick with “sold by Amazon.com” given Sony doesn’t seal its boxes and you never know if you’re getting a defective lens or return from a 3rd party seller). Side note: Amazon does not package the lens well, see attached photo.