Nikon Speedlight SB-910 slide viewer You can also use this

You can also use this as a perfectly fine 35mm f2

swivelling monitor with viewfinder attachment

locking and releasing ball and swivel in one twist

like some kind of futuristic cyber-hacker

The meter is not a great surprise

Nikon Speedlight SB-910 slide viewer You can also use thisThe Nikon Speedlight SB 910 is a professional on camera flash that provides full manual control on or off camera, plus full TTL capability on Nikon DSLRs. The SB 910 has a tilting swivelling zooming head, a PC sync connector, and Commander capability with compatible cameras and Speedlights. Excellent cosmetic condition, good function. Includes stand, diffuser, and softcase.