Re: [APML] Film for Comet Ikeya-Zhang

[Philip Perkins <philip@astrocruise.com>]

Chris,

I have two recommendations based on likely exposure time.  When I was 
photographing Hale-Bopp I duplicated all exposures with two films:  Fuji 
SuperG 800 and Kodak PJM-2.

With exposures of less than about 1 minute the Fuji was consistently 
superior.  You can see an example here:
http://www.astrocruise.com/hb64.htm
This particular film is not available anymore, however my tests with the 
NHG-II 800 show that it should record in a very similar way.  It has 
excellent broadband recording characteristics (i.e. good for comets) though 
don't expect it to record much in the way of Ha emission.

With exposures of more than about 1 minute the Kodak PJM-2 was consistently 
superior.  You can see an example here:
http://www.astrocruise.com/hb54.htm
This film is also discontinued, though its direct equivalent is PJ400 (if 
you have any of that left) or LE400.  The PJM-2 was hypered though I don't 
think that made much difference to this particular result (might have 
enhanced the blue somewhat)

Hope it goes well,
--Philip


At 22:45 20/02/02 -0800, you wrote:
>I'm planning on shooting this comet during the first half of March when its
>at its brightest.  The only down side is that the comet is going to be quite
>low in the western sky after twilight.  There looks to be about a 30min max
>window of dark sky while still being high enough above the horizon to shoot.
>I was thinking of shooting un-hypered Fuji NHG-II 800.  Has anyone used this
>film on comets?  If so, what were the results?  Are there any other fast
>films that would work?  I think Matt used Provia 400 on a comet a few months
>ago.  Any others?
>
>
>Chris
>
>
>==================
>Chris Cook
>Astronomical Photography
>www.abmedia.com/astro
>
>
>
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Philip Perkins - philip@astrocruise.com
Wiltshire UK & Luberon France
Astrocruise - http://www.astrocruise.com


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