Re: [APML] New images: Butterfly, California, Valentine, M31, EasternVeil

[Jerry Lodriguss <jerry@astropix.com>]

Hi Stuart,

Most of these images have severly clipped histograms on the shadow end.  It 
could be happening in the scan or in the subsequent processing in 
Photoshop.  If it happened in the scan, you would need to re-scan them so 
that they are not clipped.

Do the scan and then, without doing anything else, open the image in 
Photoshop and look at the histograms. Then you can see if the data was 
clipped in the scan.

Laptops are extremely difficult to use for image processing. You should be 
using a CRT.

Jerry




At 06:37 AM 9/29/2003 -0400, you wrote:
>Rob, thanks but I think you are too kind. John Mirtle has pointed out that 
>the images are dark and badly clipped (and the Gamma Cygnus too red). I 
>may have older drivers than are available for the scanner too - will check 
>on that. I am thinking I should re-scan them and try NOT adjusting the 
>images in the pre-scan (Jerry L - am I crazy?). I may be clipping my data 
>before I ever get it to Photoshop.
>
>I think I had some forest for the trees too - should have given it a rest 
>and looked again before posting.
>
>Question for all: I'm doing this on a laptop and find that simple things 
>like orientation of the screen changes dramatically what I see and maybe 
>I'm making a mistake trying to use a laptop - given all the talk about 
>monitors and calibration I've seen, am I making a blunder using this computer?
>
>Also, Dominic, thanks for spotting the broken link.Not at all sure how 
>that happened or how to fix - same procedure for all the links gets one 
>pointing at my hard drive?
>
>Stuart
>
>Robert Gendler wrote:
>
>>Stuart,
>>Very cool widefield stuff. I like Andromeda the most. The widefield
>>gives a different perspective and the subtle colors are very nice.
>>Rob Gendler
>>Email: robgendler@att.net
>>Web site: http://www.robgendlerastropics.com/
>>----- Original Message -----
>>From: "Stuart Heggie" <stuart.j.heggie@sympatico.ca>
>>To: "Discussion of Film Astrophotography" <astro-photo@seds.org>
>>Sent: Sunday, September 28, 2003 9:50 PM
>>Subject: [APML] New images: Butterfly, California, Valentine, M31,
>>EasternVeil
>>
>>
>>
>>
>>>Spent last weekend without my autoguider so guided these manually
>>>shooting my 180mm ED lens at f2.8.
>>>All on Supra 400, all 20 minutes and all scanned on my Minolta Scan Dual
>>>
>>II.
>>
>>
>>>All can be accessed from:
>>>
>>>
>>http://www3.sympatico.ca/stuart.j.heggie/Stuart.J.Heggie/Long_telephoto_pigg
>>yback_photos.html
>>
>>
>>>but the new ones are:
>>>
>>>
>>>
>>http://www3.sympatico.ca/stuart.j.heggie/Stuart.J.Heggie/ltpb_photos/Gamma_C
>>ygni_wide.html
>>
>>
>>http://www3.sympatico.ca/stuart.j.heggie/Stuart.J.Heggie/ltpb_photos/Califor
>>nia.html
>>
>>
>>http://www3.sympatico.ca/stuart.j.heggie/Stuart.J.Heggie/ltpb_photos/Valenti
>>ne_Sept20_2003_180ED.html
>>
>>
>>http://www3.sympatico.ca/stuart.j.heggie/Stuart.J.Heggie/ltpb_photos/Androme
>>da.html
>>
>>
>>>now this one is pretty ratty looking but at least I tried it:
>>>
>>>
>>http://www3.sympatico.ca/stuart.j.heggie/Stuart.J.Heggie/ltpb_photos/Eastern
>>_Veil_June2003.html
>>
>>
>>>Comments and critiques most appreciated.
>>>
>>>Stuart
>>>
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>>>
>>
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>>
>
>
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