ChrisM
17-02-2013, 02:14 PM
Getting a clear sky last night after the disappointment of being clouded out for DA14 the previous night, and for something different, I tried the Meade 14"ACF with the D7000 SLR at prime focus on a few classic DSOs, mainly just to test the light gathering ability, and to get a feel for the FoV on the chip. All pics were unguided.
The targets were:
Eta Carina (central part only) - 89 secs at ISO 1600
Omega Centauri - 59 secs at ISO 1600
Tarantula nebula - 119 secs at ISO 2500
ICNR used on each picture, no cropping, minor adjustments made in LR4.
Known issues last night included seeing (especially at 3556 mm FL), focus, collimation and polar alignment. Imaging with this scope is not a priority for me, but if I sort out those issues one day, I think that it's got potential.
Chris
The targets were:
Eta Carina (central part only) - 89 secs at ISO 1600
Omega Centauri - 59 secs at ISO 1600
Tarantula nebula - 119 secs at ISO 2500
ICNR used on each picture, no cropping, minor adjustments made in LR4.
Known issues last night included seeing (especially at 3556 mm FL), focus, collimation and polar alignment. Imaging with this scope is not a priority for me, but if I sort out those issues one day, I think that it's got potential.
Chris