first NGC 55

[raymo]

15 x 90 secs ISO 1600.
raymo

[codemonkey]

Nice one raymo! I'm surprised you see so much with a dSLR and 90s exposures... I've been trying to capture this one with a mono CCD and it's pretty dim; I'm taking 600s exposures! Looking at your effort here with 90s maybe I should cut back and just take more of them...

[raymo]

Thanks Lee, I don't recall what size scope you use.
raymo

[codemonkey]

It's an 600mm F7.5 refractor, so it's about twice as slow as your scope, but the camera is also undersampled and yours would be oversampled so that would offset it somewhat.

[glend]

Nice Raymo. I have imaged NGC55 recently at Bretti and tried 10 minute guided subs at ISO800 - which looked great initially in test subs on the Canon screen but enlarged later in Photoshop showed slight star trails - so I have to reshoot soon. I think I will drop back to 3 and 5 minute subs next time. I try to resist using ISO1600 because of noise but you've convinced me to try it.

[LightningNZ]

Nice shot Raymo. I need to get around to processing my own data of this.

[nebulosity.]

Gee, that's nice. Good work Raymo :thumbsup:

Jo

[raymo]

Thanks Glen, Cam, and Jo.
Glen, I don't know about you, but after my first full length sub
I magnify the screen to it's max to check for trailing, and about half way through the series I do it again to check that focus hasn't changed. I am working on a crude home made cooler box so that I can hopefully continue to use 1600 through the
summer. I seem to recall hearing somewhere that once you get over about 5 mins, diminishing returns start to creep in; I
wouldn't know from experience, having never tried anything over 2 mins since leaving film behind.
raymo

[cometcatcher]

Not too bad. A bit of a bright spot near the middle - bottom of the frame.

[rustigsmed]

nice one raymo - very nice, and good colour,
after my recent grus quartet I think I am of the opinion that dslr's are better suited to galaxies than other DSOs.

cheers

russ

[raymo]

Thanks Russ, I think you are right.
raymo

[Rex]

Another cracker Raymo, really nice.

[raymo]

Thanks Rex, 55's quite pretty, I'll have to have a longer go at it when
the weather allows.
raymo