R: R: [APML] Provia trails

["Marco Lorenzi" <lorenzi@libero.it>]

Hi Matt, thanx for your comment but I am not very happy with the results,
and that's why I didn't linked the images to the main page. I am waiting for
my new scanner (I just bought the Polaroid 4000) and I must check if the low
response of the film to red light is a problem of the scan or not. I will
reprocess everything in a close future. For sure the response of the fuji is
very good for blue target. I have another shot of M45 that I had to cut down
to 20 minutes because of clouds that seems to shows a lot of blue despite
the short exposure. I will put on line all the results within a couple of
weeks...
Marco

----- Original Message -----
From: Matt BenDaniel <matt@starmatt.com>
To: <astro-photo@seds.org>
Sent: Sunday, December 09, 2001 4:03 PM
Subject: Re: R: [APML] Provia trails


> 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/l
orenzi/images/m31.jpg
> >M33 is a single image of 50 minutes.
>
><http://www.astrosurf.com/lorenzi/images/m33.jpg>http://www.astrosurf.com/l
orenzi/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
>
>
> --  APML Archives at <http://astro.umsystem.edu/apml/>  ---
>              Unsubscribe at <majordomo@seds.org>


--  APML Archives at <http://astro.umsystem.edu/apml/>  ---
             Unsubscribe at <majordomo@seds.org>