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Re: [APML] Exposure Question
Bill - great image! Despite the fridge full of Supra400 I think I'm
going to have to pay the premium and try E200 - the reds are to die for.
Stuart
William R. Mattil wrote:
>Brian Larmay wrote:
>
>
>>Bill, that is an incredible shot of cygnus!
>>
>>
>
>Thanks Brian. Even a blind squirrel (me) gets lucky once in a while :^)
>
>
>
>>Ok... I never really read about large format but have an idea thereof..
>>
>>
>
>Well its medium format but I'm picking nits <laughs>
>
>
>
>>So what Im seeing in this photo is one frame at 105mm?
>>Is this what the lens sees and records for that FOV?
>>
>>
>
>Yes. 105mm lens with a 6x7 is roughly equivalent to a 50mm lens on a
>35mm body. There are plenty of regulars here that can expound on the
>medium format far better than I. I am a very recent convert :^)
>
>But the point is that even with 35mm, say 105mm @ f/2.8 1 hour on E200
>works well. And a few will even push it a little during processing.
>Though that may be more at f/6 and above.
>
>
>
>>I have to get me one of those if thats the case!
>>
>>
>
><laughs> Astrophotography is a sickness ... there is no cure. Prices are
>coming down with the advent of CCD Cameras so 6x7 isn't all that
>expensive. Of course after you get one you will need a AP traveller with
>field flattener, or a AP155 .... Or a 12,5" Ritchey or ..... heck you
>get the idea
>
>BTW the night I shot that image I actually shot 4. All 60 minutes and I
>am curious what it would look like stacked ? Also
>
>http://www.celestial-images.com/Cygnus.html
>
>Was my first light image with this camera. Same subject but framed
>differently and it includes IC1396 in Cephus. Also 1 hour. There is no
>substitute for dark skies.
>
>Pentax 6x7's show up on Astromart and Ebay all the time.
>
>
>Regards
>
>Bill
>
>
>
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