Zeiss-Ikon Nettar 518/16 studio But you should know that

But you should know that this adapter will also let you use Pentax M42 lenses

but you can rotate it so that the flash tube is vertical or horizontal- and it includes a diffuser panel for wide angle lenses (to 28mm)

sort of works

If you need a loupe

The Spiratone 75mm f3

Zeiss-Ikon Nettar 518/16 studio But you should know thatThe Zeiss Ikon 518 16 is a compact folding camera that shoots 6x6cm exposures on 120 rollfilm. It's equipped with a scale focusing 75mm f4. 5 Novar Anastigmat lens in a five speed Velio shutter. This Nettar is in excellent condition, with only minor cosmetic wear. Lens is clean, bellows are good, and the shutter works well through the range. About as close to pocketable as medium format gets.