Thanks for the suggestion, Roy. I think I be asking for significant vignetting by doing this, though. It looks like Lee has sort-of the same idea with a ring for 110mm filters*. It is round, though, and must be screwed in (!) to the lee adapter. Of course, being Lee, the small thin ring of metal is $52. It looks like I will have to try to fabricate one myself, perhaps out of a cokin "lens cap", as a prototype. Andrew * http://www.bhphotovideo.com/c/product/218398-REG/LEE_Filters_FP105_Accessory_Front_Thread_Adapter.html On Tue, January 29, 2013 8:26 am, PhotoRoy6@xxxxxxx wrote: > > After putting on the polarizer could you space out the distance to the > Cokin holder by put in a step up adapter ring and then a step down adapter > ring to give yourself space to turn the polarizer? You could also use > several skylight filters as spacers.(even with the glass broken out). If > you have an old polarizer you could break out the filter and put it next > to the Cokin adapter so when you twist the working polarizer the Cokin > filter would not turn. Roy > > > > In a message dated 1/28/2013 11:59:48 P.M. Eastern Standard Time, > asharpe@xxxxxxxxxxxxxxxx writes: > > 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. > > > >
