C-mount

[dfen5]

I have a night vision device that takes C-mount lenses. I'm hoping to put a camera on the eyepiece of the monocular but I'm confuzzled by the focal length of C-mount lenses to get a lifesize non magnified image. A quick squint sees a lot of them going from 11-110mm? Are they the same as 35mm using 50mm lens? i'm not thinking of the camera and of the monocular as I have an adaptor for this.

[VxDuncan]

To get a sensible "lifesize" image as you say is not just dependant on the focal length, but also the size of the imager. The larger the imager, the larger the field of view for a given focal length. Should be able to get a better idea once you know that.