Atmos
13-06-2016, 11:45 PM
Had my mount setup from last night and as I knew clouds were going to be rolling in I decided I would do some visual, atmosphere was boiling. Packed the FC100 away and put the camera on there for some testing, had a mount adapter arrive last week.
This is 30x60s with my Nikon D700 unmodded as ISO800. Was taken with a 24-120mm F/4 at F/4 so the coma is quite horrendous!
Given that this was taken with a 60% moon and from the light polluted burbs of Melbourne, I am quite happy with the end result. Wasn't until I loaded them onto the computer that I realised that the focus was off (redid it a couple of times throughout the shoot). Possibly should have used a brighter star than some random one in the field at the time. May even see if a Bahtinov Mask I have for my guide scope will be usable on the lens, I have my doubts but it could be worth a shot.
I love how the thumbnail version virtually no discernible aberrations at all :P
For a high res, go to Astrobin (http://www.astrobin.com/full/252191/0/)!
Just as a little FYI for those interested in sensor comparisons. Having looked up the performance of the sensor in the Nikon D700, its closest cousin performance wise would be a OSC KAF-11002. 8.445 vs 9 micron pixels, the D700 has a bit lower read noise but the KAF has marginally larger well depths (about the same dynamic range). As this still has the IR block, not great with Ha though.
This is 30x60s with my Nikon D700 unmodded as ISO800. Was taken with a 24-120mm F/4 at F/4 so the coma is quite horrendous!
Given that this was taken with a 60% moon and from the light polluted burbs of Melbourne, I am quite happy with the end result. Wasn't until I loaded them onto the computer that I realised that the focus was off (redid it a couple of times throughout the shoot). Possibly should have used a brighter star than some random one in the field at the time. May even see if a Bahtinov Mask I have for my guide scope will be usable on the lens, I have my doubts but it could be worth a shot.
I love how the thumbnail version virtually no discernible aberrations at all :P
For a high res, go to Astrobin (http://www.astrobin.com/full/252191/0/)!
Just as a little FYI for those interested in sensor comparisons. Having looked up the performance of the sensor in the Nikon D700, its closest cousin performance wise would be a OSC KAF-11002. 8.445 vs 9 micron pixels, the D700 has a bit lower read noise but the KAF has marginally larger well depths (about the same dynamic range). As this still has the IR block, not great with Ha though.