Astromart

March 20, 2006 11:37 PM Forum: CCD Imaging and Processing/Solar System

Jupiter 3/18 The Grand Slam

Hi Chris -

Excellent work! It is a little painful for us northerners to see your detailed jupiter images and those from our friends down under - but I am learning to live with the pain and enjoy the view!! grin

best -
Alan

March 26, 2006 11:49 PM Forum: CCD Imaging and Processing/Solar System

solar gaze-elle

Posted By Alan Friedman

Here is a more traditional representation. These images captured with a 90mm Coronado H-Alpha filter on my 4" A/P refractor working at f20.

Alan

March 27, 2006 02:55 PM Forum: CCD Imaging and Processing/Solar System

Jupiter, March 26

Posted By Alan Friedman

Wonderful detail in this picture, Anthony - thanks for posting it.

Alan

March 29, 2006 10:24 PM Forum: CCD Imaging and Processing/Solar System

Saturn March 28, 2006

Posted By Alan Friedman

Hi Ed -

That's a very beautiful saturn image - perhaps just a touch shifted toward cyan in the highlights - but the processing is really excellent.

Thanks for posting it.

Alan

March 30, 2006 08:44 PM Forum: CCD Imaging and Processing/Solar System

Saturn 03/29/2006

Posted By Alan Friedman

Hi Kaz -

That's a very nice Saturn - though I wouldn't say you've reached the limit of potential for your A/P 6". Saturn is dimmer than the other planets and this proves a challenge for the smaller scope. You didn't mention the camera you are using - I would recommend considering a b&w camera for its increased sensitivity. You can capture the luminance with the b&w camera and combine it with an image from a color camera, or use a filter wheel to capture RGB. The color will take significantly longer shutter speeds to get good signal/noise ratio - but this will not be a problem in an LRGB image since the RGB supplies only the color - it does not need to be sharp and detailed.

Hope these thoughts are helpful - look forward to seeing more images from your A/P refractor (I have one too!)

Alan

March 31, 2006 07:42 PM Forum: CCD Imaging and Processing/Solar System

Saturn through a 17 inch Cassegrain in poor transp

Posted By Alan Friedman

Great to read your report and see the image through this big cassegrain. You might consider using eyepiece rather than barlow projection to have greater adjustment of the image scale. Somewhere between the two is probably best in average seeing. This image is probably over sampled for the seeing and it looks like the poor transparancy left the image a little starved for signal. But it is nice nonetheless.

I hope you have a chance to try again and share the results.

Alan

April 3, 2006 03:35 AM Forum: CCD Imaging and Processing/Solar System