Zeiss Ikon Ikonta 521/16 lens mount_Large Format This is an original Type

This is an original Type 2 eye level prism for the Nikon F

It's smaller

designed to accept another Arca-compatible rail

Available in standard hot shoe mount (AS-9) and with an over-the-rewind shoe for the Nikon F3 only (AS-8)

Do not expect the meter to work

Zeiss Ikon Ikonta 521/16 lens mount_Large Format This is an original TypeThe Zeiss Ikon Ikonta 521 16 is a compact folding medium format camera that shoots 6x6cm images on 120 rollfilm. In excellent condition, this Ikonta has a clean scale focusing 75mm f3. 5 Novar lens, good bellows, and a neat little pop up viewfinder. Cant get much smaller than this and still shoot 6x6.