Re: [APML] Auriga Wide Field

["Volker Wendel" <volker@spiegelteam.de>]

Hi Matt,

you had a really successful trip to AZ!

The auriga shot is wonderful and I know how hard it is, to remove gradients
of wideangle lenses. It is, as you pointed out much harder than telescope
vignetting because of the gradients from the skies from uneven lightcones
and different distances of your frame to the horizon.

Here are two results made years ago with my Sigma 28mm 1,8 at 2,8:

http://www.spiegelteam.de/Galaktische%20Nebel/Wintermilchstr28.jpg  I made
this shot in 10500 ft Altitude in the Alps in Switzerland. There was a hard
gradient to the south because of the light of the Milan which is 150km south
of my side and because this frame nearly touched the peaks near the horizon.
And there was a gradient due to the vignetting of that lens at f/2,8 as you
can imaging <g>. The film I used was PPF 400 and itīs single exposure.

http://www.spiegelteam.de/Galaktische%20Nebel/Skorpion28mm.jpg This shot was
made under the extremly dark skies of Namibia with the Center of the Milky
Way overhead. Itīs also a single shot but made with Royal Gold 400
unhypered. It was made in 1998.

Volker
www.spiegelteam.de



> Here's another shot with the Pentax 67 55mm lens.
>
> http://people.ne.mediaone.net/mbendaniel1/gallery/astro/auriga_wide.html
>
> I find that processing wide field shots is harder than telescopic shots,
perhaps because there is a wider variation in the background colors. This is
tougher when vignetting figures in.
>
> Comments Welcome.
> --
> Matt BenDaniel
> http://starmatt.com
>
>
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