Sigma EF-500 DG ST for Nikon TTL ac coupler and a Really Right Stuff

and a Really Right Stuff L bracket with Arca-type mounting surfaces

or adapt it to nearly any other mirrorless system

8 AIS Fisheye-Nikkor is probably the lens you picture when someone mentions a fisheye

plus a proprietary quick release plate

" This back shoots 10 6x7cm frames on standard 120 rollfilm

Sigma EF-500 DG ST for Nikon TTL ac coupler and a Really Right StuffThe Sigma EF 500 DG ST is a versatile flash unit for Nikon TTL compatible film cameras (not digital cameras!) It's fully TTL compatible, and it also has full manual controls, if you're into that kind of thing. Includes case, stand, and instructions.