Olympus Zuiko MC-Macro 1:3,5 f=38mm lens
Olympus Zuiko MC-Macro 38mm f/3.5 lens. This lens has RMS threads on the rear and requires an RMS to T-mount adapter and also a T-mount to Nikon or T-mount to Canon EOS adapter.
Taken with a Canon 20D through a Nikkor-P 105mm f/4 bellows lens at f/8 attached to a Nikon PB-4 bellows. 22 1/3-second exposures at ISO100 in a DOF stack were combined with Helicon Focus lite 5.0