Re: [APML] Star Trail colors??

[Ray Butler <ray.butler@nuigalway.ie>]

Scott Hammonds wrote:

 >  Hi Film Connoisseurs,
 > I recently returned from a successful trip to New Mexico Skies with my
 > friend Chris Hetlage from the Atlanta Astronomy Club. It was a great trip
 > and Mike and Lynn Rice are outstanding hosts. I have quite a few shots to
 > process, over 30 frames, plus star trails. While scanning the star 
trails I
 > noticed a big difference in color between the 2 different films. 
Kodak E200
 > and Fuji Velvia 100F
 >
 > Here is a link to a processed shot using a fairly new film(at least 
to me),
 > Fuji Velvia 100F. It had a green cast to it on the long exposures, 
but not
 > on the daylight shots. What do you think of the color?
 > http://www.creatorsview.com/astrophoto/nms04/polartrails.html

Scott, that's a lovely star trail composition with the foreground trees. 
It's a keeper!

To judge the film's colour response, and the nature of the "big 
difference in color" that you report, we'd really need to see your E200 
trails side by side with it. But from the Velvia shot alone, the trails 
seem to be predominantly bluish, with weak oranges and reds. I'd expect 
more pronounced/diverse colours with E200.

Ray


> 
> Here is a link to a few daylight shots:
> http://www.creatorsview.com/astrophoto/nms04/daylight.html
> 
>  
> Thanks,
> Scott Hammonds
> www.creatorsview.com	
> 
> 
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-- 
Dr. Ray Butler (ray.butler@nuigalway.ie || ray@physics.nuigalway.ie)
Lecturer, Dept. of Physics || Computational Astrophysics Laboratory
National University of Ireland, Galway, University Road, Galway, Ireland.
Tel: +353-91-524411 ext. 3788   FAX: +353-91-525700

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