Re: [APML] M31 pentax67 e200 FSQ-106...

[Steve.Holak@bcitpa.com]

Jeff,
     Tony Hallas has a wonderful M31 on his site, but I didn't see the
details;  it looks and "feels" like a film shot -- he does some CCD
(remember his jaw-dropping NGC7331?) but I don't think he does for wide
field yet.  Drop him a line and see what he used.  (Or maybe he'll chime in
with his advice.)

--regards
--steve


Steve Holak
Senior Software Architect

Brokerage Concepts IS Dept.
610-491-4879

email:  steve.holak@bcitpa.com


                                                                                                                        
                    Jeff Crilly                                                                                         
                    <jlcapml@sbcglobal        To:     Discussion of Film Astrophotography <astro-photo@seds.org>        
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                    Sent by:                  Subject:     Re: [APML] M31 pentax67 e200 FSQ-106...                      
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                    08/17/2004 04:03                                                                                    
                    PM                                                                                                  
                    Please respond to                                                                                   
                    Discussion of Film                                                                                  
                    Astrophotography                                                                                    
                                                                                                                        
                                                                                                                        



Couple comments on your insightful comments...

First.. what good insight.. I hadnt considered other
films.
Provia400f on M31 just didnt seem to be very good at
all.
It may have been too short of an exposure.

>
>      I agree that E200 pushed +2 and curve
> stretching on single shot of
> this object probably always going to be around this
> level of  "grainyness",

One thing I did was to do the scanning and stretching
on 16 bit data, then knock it down to 8 bit.   I think
this
helped, but there is definitely still some grain.  I
also
added a tiny bit of unsharp masking.

> but I bet 3 X  60 averaged or median combined,

I'm still trying to figure out how to combine a _big_
image set.
e.g. 6kx5k pixels.  The current machine is 512mb, and
it
has a tough time with the 6x7 2400dpi scans.

I'm definetely going to be capturing more M31 images
for combining, etc.  I'll likely experiment with other
films... its possible that some of the non-nebula film
might be good on the galaxy.

jeff

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