Re: R: [APML] Provia trails

[Matt BenDaniel <matt@starmatt.com>]

Marco,

Nice shots!

Yup, it sure looks like 400F's H-alpha response is low.

Matt

At 11:44 AM 12/9/2001 +0100, Marco Lorenzi wrote:
>Hi All, I have just uploaded a couple images taken through my WO 100 f/8 reduced to f/6.4.
>M31 is a stack of two images 50  minutes each plus one of 5 minutes used to mask the core. 
><http://www.astrosurf.com/lorenzi/images/m31.jpg>http://www.astrosurf.com/lorenzi/images/m31.jpg
>M33 is a single image of 50 minutes.
><http://www.astrosurf.com/lorenzi/images/m33.jpg>http://www.astrosurf.com/lorenzi/images/m33.jpg
>The Provia 400F seems to be very sensitive to blue light but not very much to the red one, apart of course from intense light sources (M42, M8...). I am looking to take a couple of exposures of M31 also on E200, in order to better balance it. 
>I have still to process other images taken on Provia 400F and one is on the Veil Nebula, so I should see its OIII response. Unfortunately these days I am quite often not at home and therefore I don't think I'll put anything online before a couple of weeks.
>Marco 

--
Matt BenDaniel
http://starmatt.com


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