filter adaptation

[william_3670]

Hello, I have a 240mm sironar s lens that takes 86mm filters. I'm thinking of purchasing a 450mm nikkor m, that I believe takes 52mm filters. Is there a way to use the filters from the rodenstock on the nikkor. Thanks in advance.

[william_3670]

Hello again, The filter size of the nikkor is 67mm, not 52mm, sorry for the error.

[Gem Singer]

William,

Assuming that you already have 86mm. glass screw-in filters that you are using on your 240 Sironar-S, you should have no difficulty finding a 67mm. to 86mm. step up ring that will enable you to use those same filters on the Nikkor 450M.

[Jim Rice]

I wish that I could be encouraging here but, alas, I cannot. If you're working in 8x10 I fear that vignetting issues will arise with a step-up ring on the 240. I am currently in the market for a B+H 67mm wide angle polarizer for this very reason.

[Jim Rice]

Oops, I read the question backwards, didn't I? In which case, nevermind.

[Bob Salomon]

Heliopan makes very thin, black, brass step up rings. 67 to 86mm is a standard size for these rings.

[william_3670]

Thanks for the input, the only 67-86 step up ring I've been able to find so far is a Contax 67-86 that B&H has on their website. The Heliopan sounds wonderful if I could find one. Also,Jim, I often get things backward, I think there's a name for it, I can't remember what it is. Someone told me when I hit 55 I'd loose two things, my memory and something else, I can't remember that either, Cheers.

[Scott Rosenberg]

william... this is a quite common situation. i use 67mm filters on all my lenses, regardless of their native filter size. as eugene and bob suggested, i simply use a step-up ring for each lens from it's size to 67mm. that and some 67mm snap on lens caps is all i need to have but one set of filters!

[Jim Rice]

Alas, William, I know all too well what the other thing is.

[Jim Rice]

And if anyone, say Bob, can explain the differences between the various wide-angle filters it would be greatly appreciated. And I could go Heliopan. ;