Boats on Ice (long exposure night shots)

I went out with a local camera group and we tried some long exposure shots down at Auke Bay Harbor. It was fun, and I got some interesting shots. The OMD was pretty good for this, though I noticed banding in some shots. In others, no banding at all, even when I pushed the exposure all the way in Lightroom, just nice random noise. Strange. This was with the 12-60 4/3 lens.

The ice forms on these clear nights if there is little wind. I think there is a fresh water source somewhere too.

These were all with anti-shock and auto noise reduction.

Here they are in my smugmug gallery where I think they look a little better...

http://www.juneauphotographs.com/Boats/Waterfront/5546119_S6hhzx#!i=2205601018&k=xtbD59g

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John Krumm
Juneau, AK