AW: [APML] question on HorseHead shot

[a.roerig@t-online.de (Andreas Rörig)]

Hi Bobby,

the nebulosity in your image is real. I just checked two deep shots from
my friend Josef Mueller he took with his 10" Schmidt on TP. The 6cm
negatives cover a much larger area of the sky and requested region is
almost at the middle of the negative. So there is no doubt. The whole
area between the zeta Orionis region and M42 ist full with faint
nebulosity.

Best regards
Andreas

P.S. Even if you say it's not a keeper, I like that image.

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> -----Ursprüngliche Nachricht-----
> Von: owner-astro-photo@seds.org 
> [mailto:owner-astro-photo@seds.org] Im Auftrag von Bobby Middleton
> Gesendet: Montag, 23. Dezember 2002 12:36
> An: astro-photo@seds.org
> Betreff: [APML] question on HorseHead shot
> 
> 
> I've posted a shot that's not a keeper because of some 
> trailing and long stars plus film flatness issues with the TP 
> component. It's the horsehead region done with the BRC and 
> 6x9 camera. I will re-do the TP part. The color E200 shot is 
> OK. http://www.koyote.com/users/bobm/horseheadBRC.htm
> This shot is pretty deep and the question I have concerns the 
> nebulosity on the right side of the image. I don't see this 
> on most shots of this region, but there are hints of it on 
> one of my images. Is this nebulosity really here or has it 
> been overly enhanced (even created?) from differential 
> reciprocity failure of the green and blue layers of the E200 
> out at the edge of the frame caused by light fall-off and 
> vignetting? I often get some of this at the edged of the 
> frames and usually process it out, but it gets down to 
> judgement on how much red is really there sometimes. Does 
> anyone know of a deep shot of this region I can check? Bobby Middleton
> 
> 
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