Taken from Kearney, NE with a Pentax K-01 at ISO 800, 1/10 sec at f/8. Sigma EX 50-500mm f4.5-6.3 APO DG (Bigma) at 420mm. These were simple camera on tripod exposures (no tracking/guiding)
Full frame:
Crop of the above with micro contrast enhanced a bit with Topaz Clarity:
Same exposure, except ISO 3200 at 500mm:
Full frame:
Crop of the above:
Comments and criticisms welcome. Full account:
This was one of our planned astrophotography classes (open to the public at our small university, thanks to a NASA grant), but since my
wife was ill, and I figured I could do it as easily from my yard, Idid not attend the class at the observatory. I set my phone alarm to
1:35 AM (I thought) but somehow made it PM. I awoke a couple ofminutes after 3 AM and hurried out the front door with the equipment I
had set up the night before.
One dumb thing I did was attache my p0 ballhead to the K-01, insteadof the Bigma's tripod foot. No idea why I did that, but the Arca-Swiss
monoball p0 did a find job of supporting the whole thing with no sag,even racked out to 500mm. I was very impressed with that. I HIGHLY recommend that
ball head. Huge weight capacity and can be tightened / loosened with mittens, if need be.
I haven't had time to closely look at all of the images, but it was obvious on the Live View/Focus Peaking that there were moments of
better seeing and other moments of blur, due to the atmosphere. I shot with the 2 sec self-timer to hopefully let any movement from my
pressing the shutter button settle down. (No mirror flop to worry about with the K-01)
If it is clear for the next one in October, I think I will try to bracket and HDR to include some stars in the image. Hopefully I will
be a little better acquainted with my tracking equipment and will be able to do a time lapse, of that one, as well. With a little planning
I could probably be shooting both cameras on different tracking equipment (K-5 II and the K-01).