Jump to content

Flange focal distance of 9.5 mm camera ?

Joel Pierre

Recommended Posts

What can be the flange focal distance of a 20 mm Cinor lens of a 9.5 mm camera (Pathé National II) ?


The thread diameter of the mount is the same as the D-mount (15.88 mm), but the flange focal distance seems to be the same as the C-mount (17,526 mm).


Can I use a C-mount lens (with a D-mount > C-mount adapter ring) on a 9.5 mm camera ?


Mechanically, yes, but optically ?



Link to comment
Share on other sites

Yes an adapter will just make a C mount lens focus at the D mount FFD of 12.29mm, so if you're correct about that camera I'm afraid you're stuck with the lens the camera came with. FWIW, all of the 9.5mm cameras I have are either standard C mount or have a fixed lens.

Link to comment
Share on other sites

The camera is a Pathé National II 9,5 mm with the standard lens (a Cinor f=1.9 / 20 mm).


There were three lenses designed for this camera plus a Hyper-Cinor screwed at the front and dividing the focal length of the lens by two (I bought this on eBay).


The distance between the film plane and the lens mount is 28 mm.


The distance between the rear lens and the film is about 17-18 mm


As the size of the 9,5 mm film is between 8 mm and 16 mm, I guess the flange focal distance, too.





Edited by Joel Pierre
Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


  • Create New...