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Get information and user reviews for this lens from Amazon: Canon EF 180mm f3.5L Macro USM AutoFocus Telephoto Lens for Canon SLR Cameras
The Canon EF 180mm f/3.5 USM L macro is an interesting lens with a very good optical performance and exceptional mechanical qualities. Nonetheless the lens wasn’t really able to fulfill the high expectations associated with a Canon L grade lens – there’re even some zoom lenses performing better in terms of resolution. Beyond the resolution aspect the lens showed pretty perfect performance figures – minimal vignetting, next to non-existent distortions and marginal chromatic aberration. The bokeh, the quality of the out-of-focus blur is relatively decent although not stellar. The AF performance of the lens is a bit of a mixed bag. If the in-focus point is in a relatively close proximity to the current setting the AF is fast. However, if the camera has no guidance where to go the AF is extremely slow. That said AF speed isn’t really relevant for pure macro photography where you tend to use manual focusing anyway. Macro photographers will certainly appreciate the “true” IF design (constant physical length) as well as the increased working distance compared to the EF 100mm f/2.8 USM macro. If macro capabilities aren’t on your wish list you may prefer to look elsewhere though. READ FULL REVIEW
Other Canon 180mm f/3.5 L USM macro EF Reviews
This is an expensive high-quality lens that focuses continuously down to 1:1 (i.e., you can take a picture of something that is 24x36mm in size, the dimensions of the standard 35mm frame). The lens has an ultrasonic motor that allows manual focusing even in AF mode. However, I found that the brand new lens I borrowed from my friend Rob was not able to reliably AF at all, even at normal distances of 10-12 feet. It worked great as a manual focus lens, though. The lens comes with a tripod collar and works with the 1.4X and 2X teleconverters. READ FULL REVIEW