NoRules

The Switar 16mm 1.8 does not cover the sensor. At 1:1 format you will get some dark corners, but not at 20-90cm close-up. At f.2.0 it is as sharp as the Oly kit zoom in the center, and the blur ...

What a great little lens for casual macro photography. I found out about the lens at this place: https://www.coinimaging.com/spir35.html It's main use is for macro stacking, due to the fact that ...