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Forum: Post Your Photos!
07-25-2009, 08:14 PM
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I believe this shot was taken "piggyback" on a small telescope. The telescope with it's polar aligned drive tracks the stars accurately enough for many minutes. I have exposed piggybacked cameras 75 minutes with as long as 300mm lenses, tack sharp, corner to corner! Polar alignment is critical for such exposures however.
I wonder if a "slow" ISO setting on the K-7 will produce an almost noiseless image and then stack these images to produce a deep exposure.
Of course this will not freeze the landscape that is within the frame. Experimenting works good here.
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Forum: Post Your Photos!
07-24-2009, 04:20 PM
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Very nice. Perhaps longer exposures at lower ISO and stacked will provide a better image. I am looking forward to your further results. I was considering the K-7 for astro work but I hear it takes automatic dark frames in Bulb mode with no way to turn it off. For long exposures I am still using film. No noise, but albeit, much longer exposures.
Thanks for posting.
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