Re: [APML] Possible Fake or Worse??

[Stephen Pitt <lthuedk@pe.net>]

Hi Stuart.  Nice guess: f6 SVEDT.  Aspect ratio 3:2.  Ratio to 35mm 
1.6:1.  Its easy to manually guide for five minutes at a pop.  The hard 
part is focusing through a downsized viewfinder at 1x!

Its O.K., I won't bite the head off the accuser.  I'd hate to be in his 
shoes though, not so much facing me as facing his community of peers.

Best regards,

Stephen Pitt: http://www.light-to-dark.com/



Stuart Heggie wrote:
> 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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