I tried stacking a Tianya GND over the B+W ND110, and I seem to be getting a purplish cast where the filters overlap.
Examples here:
The WB is more or less adjusted for the lower half of the pics.
I have another pic taken with just the Tianya, and the purplish tinge doesn't seem to be there:
Pictures with just the ND110 also turned out fine after WB adjustment.
Has anyone come across this problem before and/or know which filter is responsible? I hope that it's not some issue with the ND110 that makes it unsuitable for stacking with other filters, as I think a GND can be useful for many long exposure shots....
Examples here:
The WB is more or less adjusted for the lower half of the pics.
I have another pic taken with just the Tianya, and the purplish tinge doesn't seem to be there:
Pictures with just the ND110 also turned out fine after WB adjustment.
Has anyone come across this problem before and/or know which filter is responsible? I hope that it's not some issue with the ND110 that makes it unsuitable for stacking with other filters, as I think a GND can be useful for many long exposure shots....