Anyone know if the K&F 100mm x 100mm filter holder will properly hold a Cokin filter? I can't seem to find any real info. I hate to dump nearly $60 when I already have something that will work.
I can't say yes or no since I have no experience of the K&F holder, but 4inch/100mm filters and holder systems are common to a number of manufacturers, and they generally interchange. I have the Cokin B&W contrast filters as well as some Lee filters and a few no-name cheapo chinese ND filters all working just fine with NiSi filter holder, so I expect that the K&F will probably be fine.