I posted this over on the “Filters” forum, but I doubt it gets as much traffic as here. And since I shoot with a D300 (as well as a 200, and I have a 100 kickin’ around here somewhere…), I figured maybe I could get away with re-posting here.
Does anyone manufacture a “reverse center-spot” graduated neutral-density filter? I’ve never actually heard of one, but I need something to dodge the moon on moonlit landscape shots. Would need to be rectangular, so the “spot” could be placed anywhere in the frame, as required. Would also need to be at least 5-stops, and/or have the ability to be “stacked”.
If no one makes one, is there a way to “do-it-yourself”? That would seem ideal, sine it would allow filters with “spots” of varying size.
This probably does not exist. One would need to be able to shift the spot up or down and left or right. There are strip Graduated ND for the square filter holders because one can move the strip up or down as necessary.
Larry - that's what the orignal attachment is. Here are the two unprocessed RAW files that were combined into the image in my first post. However, I'd prefer to have a moon that maintains it's "lunar features" as opposed to the blown-out product I have here. The bridge portion was a thirteen-second exposure; as you can see, 13 secs. of full moon starts to lighten much of the sky. The moon itself becomes far larger than if it wern't blown. I could, of course, substute a much larger moon, but I'd prefer to stick with something that more closly represents the actual scene.
The closest thing I have heard of is the "reverse gradient" ND filter. It is probably designed for sunset/sunrise close to the horizon in that the dark part is in the middle and fades towards the top/bottom.
---------+---------+---------+ Joseph K Seattle, WA, USA