Summicron-R 90 filter size?

[Lex Bangladesh]

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Hi, does anyone know if it's possible to use a step-up ring with a Summicron-R 90mm (v1, 2-piece lens hood, 1977)?

 

I'm a bit confused about the info on the filter thread size that I've found. Is it an E55 or a Series 7, or is my info completely wrong?

 

Any help would be appreciated.

[jc_braconi]

E 55

 

http://www.summilux.net/documents/NoticeSummicronR90.pdf

[Lex Bangladesh]

Thanks JC!

[ismon]

This is often confusing. The v1 90mm Summicron was designed to use Series VII filters held in place by ring 14161. The actual threads on the lens are 54mm. Close-ups utilize Elpro VIIa. From lens #2770951, the thread size was changed to the more standard 55mm so that E55 filters are used, and the Elpro 3 for close-ups. I'm not sure if anybody makes a 54-55mm step up ring. True Believers have long accepted that Leitz does this stuff to test our faith.

[Michiel Fokkema]

I use a stepup ring 54-55 on my Summi 90. It does not interfere with the retractable hood.

It then has the same filter size as my 35 summicorn and 50 summilux. Very convenient.

 

Cheers,

 

Michiel Fokkema

[jaapv]

E 54 filters can be ordered as well.