Hi gang,

I've been doing HDR for quite some time and feel very comfortable with it. Lately though, I've been running into an issue when doing HDR at night (low light) - I normally shoot daylight HDRs.

I normally bracket like this: -2, -1, 0, +1, +2 (the number of frames varies).

What I am running into is that instead of getting a +2, and a +1, I end up with TWO +1s (two frames that were taken with the same exact, exact, shutter speed - 30s in this specific case). It is like I'm bumping up against a long exposure limit or something. Is this expected? Am I just doing something wrong?

TIA!

-RM

> It is like I'm bumping up against a long exposure limit or something.

That is exactly what you are hitting. The auto-exposure system maxes out at 30 seconds. You will need to adjust your "-2" calculations to be at the 30 second mark with everything adjusted higher/faster. (or go manual exposure using bulb?)

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Joseph K
Seattle, WA, USA

D700, D200, D70S, 24-70mm f/2.8, VR 70-200mm f/2.8 II, 50mm f/1.4 D,
17-55mm f/2.8 DX, 70-300mm f/4.5-5.6 VR, 18-70mm f/3.5-4.5 DX