Variable adapter for a filter holder : LUSENET : Large format photography : One Thread

Today, I was talking with Steve Grimes and asked him if he could make a variable adapter for LEE holders. He said it's very difficult and not an easy answer because of centering and filter alignment parallel to the lens. I own both normal foundation kit and foundation kit 100mm (FK100) but the cost of adapters are expensive and different filter/snap-on diameters vary so much. I believe anyone who uses a big lens, let's say >95mm has headache to mount filters (esp. ND grads) in front of the lens w/o vignetting (sure it depends on which format I use; I intend to move up to 8x10 or larger in futue). Next semester, I'm taking a machine shop course and planning to challenge to this variable adapter. I would like to hear some ideas you may have about how best the adapter should be varied (the most difficult part). I came up with a few ideas such as springs on the inner edge of the holder. I appreciate your creative inputs. It would be great if I could make a successful variable adapter!

BTW, the current lenses with push-on diameter 100mm (for FK100) are:

Does anybody know any other lenses with push-on diameter 100mm? Nikon seems to offer some W lenses with 100mm. But I can't find push-on diameters for Nikons.

-- Masayoshi Hayashi (, January 05, 2000


Sinar makes or made variable diameter adapters for theit 100mm and 125mm filters, if so i wonder if Mr. Grimes could modify one of those for your Lee holder. Or alternatively you could just switch over to the Sinar 125mm filters.

-- Ellis Vener (, January 05, 2000.

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