Folks,

I'm trying to find information for a bunch of lens mounts regarding the minimum distance between the back element and the sensor. For instance, both the EF and EF-S specification gives the distance from the mount flange to the sensor as 1.4" but the EF-S allows things to intrude further into the camera. I'd like to find this information for as many mounts as possible if someone knows a chart (F-, C-, EF-, etc.).

Also, does anyone have a reference for where the nodal points on the various Canon lenses can be found? Perhaps the location of these points moves as the lens focuses/zooms so let's call it at infinity focus.

Thanks!