30 cm Dagor step up ring

[peter ramm]

I would like to get a step up ring for my 30 cm Berlin Dagor. It is threaded for filters but I am not having much success with any of the rings that I have. Anyone know what this takes?

[Steve Hamley]

It doesn't take screw-in filters as it was designed about 60 years before the Japanese 35mm camera makers made screw-in filters popular. It takes push-on series type adapters, although you could have S.K. Grimes make a custom screw-in adapter for you.

The threads are for the glass retainer, which is the ring with the writing on it.

Cheers, Steve

[peter ramm]

Ah, we live and learn. Those Lee rubber band thingies fit OK as push-on replacements.

[vinny]

U may find my thread on this subject if u look hard enough. You need a step up ring just smaller than the lens threads. Get some atg "snot" tape, twist into a thread and stick it to the filter, push it onto the lens. It'll stay and is removable with a strong twist.
Search snot tape. I've done this with several lenses and never had an issue.