I only use the DP-100 when shooting with the Tokina and Kenko TC (CFWA). However with just the Tokina the difference between the DP-100 and DP-200 should not be great but I'd expect the DP-200 will out-perform the DP-100 by a stop or two. Check out Alex's authoritative presentation on domes - http://wetpixel.com/...thout-the-drone
HTH, Tim
