Camera mount

Camera mount is the mounting part on the lens side for fixing to the camera.
Each camera mount has a different size thread and flange back (FB: distance from sensor to lens flange)Common camera mount FB are shown below.
Mount　　　　FB(mm)　　　 Mount 　　　 FB(mm)　
C-mount 　　　17.526　　　　F-mount　　　　46.5
CS-mount 　 　12.526　 　 　M42-mount　　 ※1
S-mount 　　　M10.5/P0.5 　M72-mount　　 ※1
TFL-Ⅱmount 17.5 M95-mount ※1
※1 FB size depends on the camera manufacturer. You need to make sure both mount thread and FB are correct to get the correct image.