The Salyut-C featured a modified lens mount that has the same thread and adds the familiar plunger for diaphragm setting. This allows full automation of the lenses and the use of extension tubes and a teleconverter. This is essentially the same camera as rest of the Kiev series ...  (source: www.commiecameras.com)

Produced: 1972-1980
Name: „Салют-C“
Producer: Arsenal (Kiev)
Frame size: 6x6.
Lens: Vega-12B  2.8/90.
Shutter: 1/2s-1/1000s + B.

Quantity: ±30.000 units.
                                                         

Salyut-C  #8006048.

Salyut-C  #8006048.