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Captured by
Douglas Rollain

Lion Nebula SH2-132 - RC71

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Posts Made By: Alan Friedman

March 22, 2004 03:23 PM Forum: CCD Imaging and Processing/Solar System

Jupiter 03/20/04

Posted By Alan Friedman
Paul -

Excellent detail captured in this image!

thanks,
Alan

March 24, 2004 09:48 PM Forum: CCD Imaging and Processing/Solar System

Jupiter 03/23/04

Posted By Alan Friedman
Hi Paul -

I think the triple transit is the night of 3/27-28, not 3/28-29. Figure it was a typo - but thought I would mention it.

Alan

March 24, 2004 09:58 PM Forum: CCD Imaging and Processing/Solar System

Circular rings

Posted By Alan Friedman
Hi Vital -

I think the interference is between your H-Alpha filter and the IR filter in front of the chip in your digital camera. I see these on every image taken with my Nikon digital SLR and Coronado filter. I think the rings change with rotation of the camera body - but have not done any testing to confirm this. It is a HUGE hassle to process them out (You can still see it in the solar image I have in the gallery section which is my most successful attempt at removing them.) It is not a problem with the ToUcam as far as I can tell. It also does not seem to be a problem encountered by users of the Canon CMOS sensor based cameras.

good luck!

Alan

March 26, 2004 11:26 PM Forum: CCD Imaging and Processing/Solar System

When BIG is just TOO BIG... (long)

Posted By Alan Friedman
Hi Ivan -

If I understand your point correctly it is about the presentation of the image more than the image scale captured on the chip?

I often res up an image (increase the pixel size) during processing and then size the image smaller for display. This was an image captured in poor seeing that I posted a while back - way to big, I thought after seeing it on the forum. It is more pleasing in the smaller inset, and there is really no compromise on the detail.

best,
Alan

March 29, 2004 11:44 PM Forum: Solar System Observing

Saturn Observation (March 29, 2004)

Posted By Alan Friedman
Carlos -

A beautiful drawing and very detailed observation report! The Encke Minima always peaks my curiosity. In images it appears as a low contrast darkening over a large portion of the A ring with the Encke Division at its outer boundary. But it is often drawn as you have it - a narrow band in the center of the ring - a seeming Encke division in a slightly different location.

Thanks for posting this excellent observation,

Alan

March 30, 2004 07:44 PM Forum: CCD Imaging and Processing/Solar System

Alpine valley

Posted By Alan Friedman
Johannes -

Superb clarity in the central rill. I looked for this visually the other night - it is a very tough target.

A beautiful image.

Alan

April 2, 2004 03:51 PM Forum: CCD Imaging and Processing/Solar System

Copernicus

Posted By Alan Friedman
The shadows of the crater rim in this image and in your Plato image are so velvety and crisp - it looks like a lunar orbiter image. These are among the best I have seen.

Thanks for posting them.

Alan

April 4, 2004 04:46 PM Forum: CCD Imaging and Processing/Solar System

Plato 03/31/04

Posted By Alan Friedman
Wes -

An excellent Plato!

Alan

April 4, 2004 05:14 PM Forum: Solar System Observing

Solar Film Material

Posted By Alan Friedman
Brian -

I haven't used the black Polymer, but have been very happy with the two filters I made from the Baader film. I have used them for several years and they have held up very well. This image was captured in average seeing. In good seeing, the Baader film gives a sharper image than my glass filter.

clear skies,
Alan Friedman

April 5, 2004 05:41 PM Forum: CCD Imaging and Processing/Solar System

Re: Eagle Has landed

Posted By Alan Friedman
Beautiful - and a comforting reminder to this weary Buffalonian of warm summer nights to come! Was this object as fascinating a target before the Hubble view? I can't remember anymore.

Alan


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