Where do I get large retaining rings?

jcc · Aug 4, 2013

Does anyone have any leads as to where I can get a 80mm/0.75 retaining ring, for an Industar 37 300mm f/4.5 lens? I've googled different combinations of words and can't find a vendor. Does something like this have to be CNC machined?

AgX · Aug 4, 2013

One does not need a CNC machine to make a retainingh ring. Any lathe added by a simple drill would be sufficient.

Alan Gales · Aug 4, 2013

Have you tried S.K. Grimes? They make flanges and retaining rings.

Ian Grant · Aug 4, 2013

Look for a lens flange, they areen't the same as a retaining ring and screw to the lens board itself.

Ian

AgX · Aug 4, 2013

Are flanges more eays to obtain than retaining rings?

Ian Grant · Aug 4, 2013

AgX said:
Are flanges more eays to obtain than retaining rings?

In larger sizes retaining rings are rare and probably not strong enough for the weight of some large heavy lenses so flanges are used instead.

Ian

AgX · Aug 4, 2013

I see your point. I did not consider a mechanical issue. Yes, flanges can be advantageous, though the effect depends on the material of the lensboard.

Ian Grant · Aug 4, 2013

The Industar 300mm f4.5 lens should have a flange, that's what they normal sell with.

Ian

jcc · Aug 4, 2013

That's it, a flange! Excuse my limited vocabulary on the subject. I meant flange.

Where do I get large retaining rings?

Privacy & Transparency

Privacy & Transparency