Paul C. Buff, Inc. Technical Forum

hi guys, how thick is the abr800?

i have a sigma wide angle lens 20mm f1.8
and a nikkor 50mm f1.4

is there a way to tell if the abr800 will cause vignetting? many thanks in advance

i don't own the ring flash so i can't say but i do know whoever answers is probably going to wanna know if you're shooting full frame or if theres a crop factor coming into play.

right, Full frame or APS-s will have a different angle of view. There is no way of knowing without trying. Other factors that will affect this would be the length of the lens, and how close the camera body can get to the ring flash (this would vary from camera to camera). On very wide lenses, you can also be more prone to getting flare, depending on the modifiers used, particularly if the lens extends beyond the flash.

Is the ARB the same thickness as the ZRM? If it is I'll test it for you. I'd be shooting a D3s and 50 1.4G. I've only used it with the 24-70 2.8G.

The 50 will likely not have an issue. The 20 very well could, especially on full frame (I dont know if it is DX only or not). The ZRM1 is about 1 3/4" shallower than the ABR800.

I'll see if I can fit my 14-24 in it today and see what happens. I'll need to know the distance of the front of the body to the end of the lens to set min in there at the right distance from the front.