Konvas 1M & 2M Lens Mounts (OCT-18 & OCT-19)

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Created on Tuesday, 27 May 2008 10:33
Last Updated on Saturday, 15 December 2012 13:20
Written by Patrick Steele
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Konvas OCT18 & OCT19 Lens Mount Diagrams:

These two illustrations come from the Russian motion picture camera book Viktor was kind enough to send me. The text corresponding to the parts is entirely in Russian and does not satisfactorily translate with my basic Russian translation software, so I chose to omit it until I can get an accurate "read" on it. The parts should be fairly self explanatory in any event.

Konvas 1M OCT18 lens mount (side)
Konvas 1M OCT18 lens mount (side)

Konvas 1M OCT18 lens mount (front)
Konvas 1M OCT18 lens mount (front)

Konvas 2M OCT19 lens mount
Konvas 2M OCT19 lens mount

Konvas 2M OST19/OCT19 lens mount (side)
Konvas 2M OST19/OCT19 lens mount (side)

Konvas 2M OST19/OCT19 lens mount
Konvas 2M OST19/OCT19 lens mount

Konvas 2M ARRI PL lens mount
Konvas 2M ARRI PL lens mount

Note that the OCT18 lens mount, while a slight bit larger, is extremely similar in looks to the ARRI standard mount, but, due to a lens port diameter of 47mm and a flange focal distance of 57mm on the OCT18, while the ARRI Standard mount has a diameter of 41mm and a flange focal distance of 52mm, the two are not compatible.

The OCT19 is similar to the ARRI PL mount both in appearance and in function, but it does not resemble the PL mount as closely as the OCT18 and ARRI Standard do. The diameter of the OCT19 is 68mm and the flange focal distance is 61mm, while the ARRI PL has a diameter of 54mm and a flange focal distance of 52mm.
--Adam Frey

See also Common Soviet 16mm & 35mm Motion Picture Lens Mounts