Industar 90U 4/75 M39 Russian Enlarging Lens

 Industar 90U 4/75 M39 Russian Enlarging Lens
  •  Industar 90U 4/75 M39 Russian Enlarging Lens
Product description

 

Specificatiom
-Focal length: 75 mm
-Blades: 10
-Max. aperture: f/4
-Min. aperture: f/16
-Optical scheme: 4 elements in 3 groups (
Tessar type)
-Lens Mount: M39
Note: when installing through the normal adapter M39-Nikon, M39-Canon, M39-Pentax, Industar 90U 4/75 hurt mirror cameras, as it has a huge overhang the rear of the helix. The rear of the heavily favored. The lens can be used on a narrow format (on conventional crop cameras and modern full-frame SLR cameras) only with the macro tubes or macro fold bellows.