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Re: [APML] Possible Fake or Worse??

Ray, my immediate thoughts are a Canon 10D might be able to do this but:

    * On the downside, the curious thing is he says he used a 4"
      achromat and the image size would suggest it has at least a 3
      degree fov meaning it would have to be pretty fast focal length
      and then I'm wondering how he got such nice stars with a fast
      achromat.
    * On the upside, 15 minutes at the equiv of 800 ASA is almost
      film-like exposure. (say his rig is f/5 for a guess and I shoot 15
      min at f2.5 on 400 film so he would need 30 min to match me and
      he's using a cmos and 15 minutes - not unreasonable).
    * Further on the upside, the details that come with the note seem to
      suggest he is more than passing familiar with the tools of the
      trade and given the "exposure" the Canon D10 got recently in S&T
      it is a predictable thing to begin seeing images taken with them.

All of which boils down to "what do I know" but we're innocent till 
proven guilty and M31 shots are pretty common and this one is pretty 
good but not the one I'd rip off if that was my plan.

Stuart

RayRochelle wrote:

>Could this be true??
>Mr. Pitt says this is his photo of M31 on a CMOS 10D Digital Camera???
>I seem to recognize this photo?????!!!!!!
>Any help with this from the group??
>Ray Rochelle
>
>----- Original Message ----- 
>From: "Stephen Pitt" <lthuedk@pe.net>
>To: <digital_astro@yahoogroups.com>
>Sent: Monday, September 01, 2003 2:38 PM
>Subject: [digital_astro] Testing the Digital Waters
>
>
>  
>
>>This is my first image post using a digital anything, 
>>
>>http://www.light-to-dark.com/m31_10D.html
>>
>>and I have found the 10D to be quite a challenge, with a fresh set of
>>ideosyncrasies to deal with, like noise, uneven field colour
>>temperature (possibly heat from the electronics), and vivid background
>>colour pixellation.  The processing is at least as challenging as that
>>of film and its easy understand the need for dedicated software that
>>could make stacking and dark frame subtraction less labor intensive.
>>
>>Admittedly, I got the 10D hoping for a panacea, a short cut to quick
>>imaging, but find such things as noise reduction-like SBGNR-more of a
>>necessity than an occasional luxury.  But then, I'm not used to
>>stacking more than 2 or 3 film images and ending up with smooth pictures.
>>
>>Anyway, the chip is challenging.  I can't help but wondering about
>>cooling effects on image quality.  Perhaps, when winter comes, the
>>CMOS will be more image friendly, as ambients of 72-75 deg., such as
>>those during the above acquisition seem to be quite noisy. 
>>
>>All of this is to say, I have come to respect the work done by others
>>using their digital cameras.  And, I have to ask: Would such programs
>>like I.P. make more efficient use of time in processing the images
>>than say, P.S. and RegiStar?
>>
>>Thanking you for a reply,
>>
>>Stephen: http://www.light-to-dark.com/ iew my Photos go here
>>    
>>
>http://www.usefilm.com/browse.php?mode=port&data=17313
>Dance like no one's watching
>Love like you've never been hurt before
>Live like heaven is here on earth
>121.80/39.75
>Ray Rochelle
>
>
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>  
>


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