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I like using a CP/ND combo for waterfall photography. No matter how thin the two filters, I would get vignetting in the corners. Even with a combo of a Marumi Super DHG and B+W Slim ND, which were the thinnest 2 solutions I could find, I'd still get vignetting.
I sort of gave up for the winter as I don't shoot much, but now that spring is here I renewed my efforts. With the help of Schneider US, I had the glass removed from the slim ND in the hope that the thin retaining ring might allow me to mount the glass directly to the front of the CP. Unfortunately, that ring was a slightly narrower diameter than the front filter threads of the CP. So, I bought some UHU TAC and rolled it into a thin string. I put it around the thread area of the CP and attached the ND glass that way.
Voila...I now have a CP/ND4 combo, with NO vignetting.
FWIW, not sure anyone will care. But figured it was worth sharing.
Edited on Apr 20, 2013 at 04:56 PM · View previous versions