Andrew What you are describing is a traditional lens board with a threaded hole in the center. The easiest way is to use a sacrificial Cokin filter with a carefully centered hole and a filter ring cemented into place. Of course, any suitable piece of material would do if the thickness was correct and the size the same. On Jan 28, 2013, at 11:59 PM, asharpe@xxxxxxxxxxxxxxxx wrote: > Hi folks, > > I wonder if anyone has ever invented a slide-in adapter for the cokin > series that had threads for traditional filters? > > I know that that problem is exactly what the filter system is trying to > solve, not needing separate sizes of filter for multiple lenses, but the > fact is, sometimes (usually?) traditional filters are of much better > quality than the cokin filters. Specifically, I'm thinking about the cokin > polarizers, which are unimpressive. I already have some very good screw-in > polarizers, but I'd like to use the cokin system for my ND grads, and a > screw-in polarizer on the lens with the cokin system in front of it is > clumsy at best, unusable at worst. > > It seems that a simple slide in card with an appropriately-sized hole with > threads would be very useful. So, does it exist? If not, perhaps I can > convince folks with a kickstarter project. > > Andrew >
