Astromart

December 15, 2006 03:09 AM Forum: Refractors

Geez, how easy it can be!

Gee whiz, I am almost afraid to ask. Is the Tak FS series genuine CaF2?

Greg.

December 17, 2006 11:35 AM Forum: CCD Imaging and Processing/Deep Sky

Thanks Dietmar,

On my monitor the noise didn't show up particularly but now you point it out it does.

What happened was my darks library was set for -15C but it was a warm night and the camera only went to -12.7C. Apparently this is enough of a difference for it not to match.

So I will shoot some darks at -12.7C and redo them. If necessary I can use adaptive darks in Images Plus to match them more accurately.

As for the blue there may be a slight loss of blue and I'll check into that. Perhaps too much stretching in the early stages of stacking.

Greg.

December 24, 2006 06:15 AM Forum: CCD Imaging and Processing/Deep Sky

M1 up close HA

Posted By Greg Bradley

Nice shot David. Nice tight stars and very sharp.

Greg.

December 24, 2006 02:11 PM Forum: CCD Imaging and Processing/Deep Sky

m 42 4"f/6,2 2 hours instead of 15 minutes

Posted By Greg Bradley

Very dramatic Dietmar.

Most likely the stars are caused by your chip not being square to the scope. Do you have a screwed connection from your camera to the scope? If not perhaps the camera sagged slightly in the eyepiece holder.

If you used a rotating focuser perhaps it does not rotate square to the tube.

Greg.

December 27, 2006 09:38 AM Forum: CCD Imaging and Processing/Deep Sky

Another M45

Posted By Greg Bradley

Wow, what a stunner.

Beautiful colours, fabulous field of view, wonderful background star colours, subtle reddish/purple nebulas in amongst the blue. Perfect.

Greg.

December 28, 2006 07:08 AM Forum: CCD Imaging and Processing/Deep Sky