Russar 20mm f5.6 (Rangefinder)

The Russar 20mm f5.6 is an ultra-wide angle Rangefinder lens, which is when the glass is much closer to the sensor than normal, allowing for the lens to have extra compensation for distortion.

This lens can only be mounted to Full Frame cameras with short flange distances. I have adapted it to Sony E for the A7s ii.

The difficulty is not being able to use this lens on any EF cameras, but the low distortion and natural flare pattern of the lens makes the look worthwhile. The set covers the extreme telephoto side because it spotlights rangefinders which are wide angle with a telephoto compression.