How to change back focus for Anamorphic lenses

[Esmaeil Neisi]

Hi There,
I don't know if this been discussed before or not , but according to my experience with adjusting back focus for 2x Elite Anamorphic lenses it seems that they mach the distance marks at efferent back focus, so my question is that
I cant find any back focus adjustment system in Epic pl mount so how i could change the back focus in order to mach the focus mark at the lenses.

Best Regard
Esmaiel Neisi

 

[Alan Balian]

You can give this product a try:

http://www.red.com/store/accessories/product/red-focus

Alan Balian
VP of Technical Services
59 Still and Motion
Pier59 Digital Studios
www.pier59studios.com

 

[Esmaeil Neisi]

Alen All what i mean is i can't see any back focus adjustment sys in epic PL mount that's my point.

 

[Dan Kanes]

There is a simple way to do it, please read the epic operations manual.

There is an adjustment screw.

 

[Jeff Kilgroe]

If you're changing your back focus / FFD to accommodate different lens sets, anamorphic or otherwise, then you have lenses that are not properly collimated.

 

[Esmaeil Neisi]

Sorry Jeff but i recentlly got my one colimated its not related to that some thing elss goes on

 

[Esmaeil Neisi]

Ok Dan i will check
Thank you

 

[Jeff Kilgroe]

Sorry Jeff but i recentlly got my one colimated its not related to that some thing elss goes on

The PL mount on the camera should be set within 5 microns (0.005mm) of 52mm FFD. If the mount is properly set and verified, and you have lenses with markings that don't line up, then the *lenses* are not properly collimated or need other service. That's just the way it is, you don't adjust your back focus to accommodate different lens sets or types, unless you are changing lens mounts on the camera and need to fine-tune. PL mount should always be set the same, regardless of which PL mount lenses you are using.

The screw to change the back focus on EPIC is located on the top of the brain, right next to the row of 1/4-20 mount holes near the front of the camera. Like Dan said, it' sin the operations manual.

 

[Esmaeil Neisi]

Ok thanks Jeff Got it