Hi all,
I'm in the market for some long exposure neutral density filters. I am aware that the B+W ND110 (10 stops), B+W ND106 (6 stops), and the Hoya ND400 (9 stops) all draw criticism for exhibiting color casts. The new Lee Big Stopper (10 stops) seems to have received some favorable early reviews for color neutrality. Heliopan also has some threaded varieties, including (according to their online English catalog) an ND1.2 (4 stops), ND2 (6.7 stops), ND3 (10 stops), and ND4 (13 stops!). I'm leaning towards the Heliopans for their slim profile with front threads and the variety of densities offered. Does anyone have experience with any of these Heliopan filters, specifically in regard to color cast? How do they compare to the other high density filters on the market? Thanks for any help!
Dan




