Canon FD lense width - please HELP URGENT!

[Noel Evans]

Sorry if anyone knows the mm width of standard canon FD lenses please reply. quick google search and I couldnt see result - thought maybe someone knows of the top of their head.

I need a step down ring for mattbox. I have 82mm to 72mm then need to attach 72mm to??

 

[scharky]

It depends on the lens. FD lenses can have a front diameter, which is what I think you are refering to of anything from 48mm to 78mm, some even larger. I guess that alot of the older lenses used the 52mm front diameter, but that won't be the same for all lenses.

 

[Noel Evans]

Thats it great!