Film-Tech Forum ARCHIVE: E53 Mirror

This is topic E53 Mirror in forum Film Handlers' Forum at Film-Tech Forum ARCHIVE.

To visit this topic, use this URL:
https://ft-forum.com/ft/cgi-bin/ubb/ultimatebb.cgi?ubb=get_topic;f=1;t=012252

Posted by Christopher Woollard (Member # 2455) on 01-23-2018, 12:51 PM:

I am installing a very old Xenon insert with an E53 12 inch diameter mirror into a large lamphouse.
Does anyone know the correct distance from the rear of the mirror to the gate?
I believe the focal length for these old mirrors may have been 26" but focal length usually refers to the distance between the eliptical mirrors two focal points, one being somwhere deep inside the mirror the other just passed the gate. The projector is a Vic8.
Any advice welcome.