I've had my D300 about a year now, and I've primarily used my Sigma 17-70mm HSM underwater. I shoot it in an Aquatica housing, with the 8inch dome port, and dual DS125s, all in manual mode. The problem is that I simply cannot get a 'sharp' image. Above water the images are quite sharp, so I'm not sure what the problem is. Regardless of whether I shoot at the wide end or macro, I have a terrible time getting a sharp image. I've put three images (not cropped, just resized significantly and converted to JPG) at:
Sample pics showing sharpness problems
I'm not sure what the problem is. I shoot in manual mode, and generally shoot at f/16 or smaller apertures, 1/100 to 1/200 second. I've had about 75 dives with this camera, most with this lens and I'm just not happy with the results. I actually was able to take better pictures (crisper/sharper) with my old camera (also shot in manual mode).
I have some that are okay, but this next gallery (large pictures, not significantly resized) are the best of a couple thousand shot on a trip.
So, does anyone know if this is typical of this lens? Do I need a diopter? Could it be a camera problem? Am I just in need of some serious instruction?
I really appreciate any insight anyone can give. I'm pretty frustrated.
ordvrMember Since 18 Jul 2005
Offline Last Active Jan 22 2011 04:30 PM
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- Member Title Triggerfish
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Hillsboro, OR USA
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