I've recently embarked on expanding my imaging capabilities and with the dedicated assistance of another IISer for which I am very grateful, we've finally managed to extract the first reasonable sub out of it
First image is the central 800x800 pixels, the second is the bottom left corner, also 800x800 pixels. It's not going to set the world on fire, as it was a warm night and I'm using an uncooled DSLR at the moment...but baby steps
Barring thermal/DSLR noise, does this show promise or have I wasted time/money?
I would love to say well done, or what a load of old rubbish, Dunk, but
since you gave no acquisition details, and I have no idea what your new rig is, I wouldn't know where to start.
cheers raymo
keep 'em coming guys, guessing is half the fun the equipment is almost irrelevant, I just want to get feedback on whether or not it's a decent test image. All will be revealed
It's possible it was a tiny bit out of focus, but I don't think so. Some of the stars are big, but it was in the area of Eta Carina which has some bright stars and (first clue) it was a 10 minute exposure...
Well i'd have say it must be fairly small for an area that bright on a ten minute sub. Or a very long focal length. Could be an ED80 but that's pretty short fl for that sub unless it is cropped heavily. Am I getting warm?
keep 'em coming guys, guessing is half the fun the equipment is almost irrelevant, I just want to get feedback on whether or not it's a decent test image. All will be revealed
It's possible it was a tiny bit out of focus, but I don't think so. Some of the stars are big, but it was in the area of Eta Carina which has some bright stars and (first clue) it was a 10 minute exposure...
are you going to show the whole image?
10 mins bright area,
slow scope and im' guessing a tight fov?
thinking not a Newt because of the stars and not a refractor because of perhaps potential long focal length. SCT?
No diffraction spikes is another clue.
The fov is small, which implies 100+inch focal length, so that pretty much rules out refractors.
I am guessing it was taken with a Meade ACF or Celestron Edge HD, probably a 10"
Regarding image brightness, I should add that the image was taken at ISO400, which is substantially lower than my usual favourite...the noise behaviour of my 1100D is very decent as you approach mid single digits, so ISO1600 is very much a signal-to-noise sweet spot.
I can't wait to point this at a nice galaxy and get a set of subs on a cool night