Diameter for rear cup

Hallo,

I'm looking for a rear lens cup for my Symmar-S 210/5.6:

https://www.schneideroptics.com/info...5,6-210mm.html

But I didn't know where is the rear diameter for the cup.

Anyone could help me?

It should be a 57mm (2 1/4") slip-on for the rear, but it won't hurt to measure it yourself first.

Thank you, I try to measure myself but I wasn't sure. But do you know if in the data sheet there is some field where I can see it?

Symmar-S Group Information Data PDF.
https://www.schneideroptics.com/info...Group_Data.pdf

Please scroll 'down' to Page 3 of 4.

Once there, you will find the 'Rear Mount Diameter' for your SYMMAR-S 210mm Lens:
Dimension 'D2' = 57mm (as per above). Thank-you!

Best Regards, -Tim.