The stream of interesting and sometimes unusual manual focus optics continues with the arrival of the Samyang 20mm f/1.8 ED AS UMC lens. The lens is available in a wide variety of mounts, so let’s see how it performs with the Canon EOS 6D full frame DSLR used for this review.
Handling and Features
This is a full frame lens and also manual focus only. Having such a wide angle, the resulting depth of field makes manual focusing less easy, but provided wider apertures are used it is not too much of a problem. It does make adjusting the camera diopter setting on the viewfinder even more important than usual. The easiest technique is to focus at open aperture and then stop down for making the exposure. It is a matter of practice to be able to set an aperture by feel or counting click stops, without removing the camera from the eye.
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https://www.ephotozine.com/article/samyang-20mm-f-1-8-ed-as-umc-review-30094
