Re: [APML] Again: Meteor Photography

[Philip Perkins <philip@astrocruise.com>]

Philipp,

It's probably going to be tough to get answer to what is the film with 
*worst* reciprocity failure, because not unnaturally, people are generally 
be looking for films with reverse characteristics.  From recent 
recollection, I think that Kodak Portra was one of the worst films that has 
been tried.  I believe that the reciprocity characteristics were rather 
poor, and also its Ha response was almost non-existent.  This will not 
matter for meteor photography because the light would be predominantly 
broadband.  I believe that this film would record rather less sky fog than 
most.  Also I tried a Konica 400 film a while ago and found that it had 
rather poor recording characteristics.

Personally I would be inclined to use the new Fuji NPZ 800 (which is a 
replacement for NHG II 800).  I was impressed by this film - although its 
short term recording characteristics are very good, I found that it tailed 
off on longer exposures (unless the film is hypered) and I doubt that it 
would pick up as much sky fog on long exposures as one of the Kodak 
"classics" such as PPF.  I have seen some wonderful meteor photos taken 
with its predecessor, NHG II 800, and I think that NPZ 800 would do just as 
well, if not better.

--Philip

At 14:29 02/08/02 +0200, you wrote:
>Hi Brian,
>
>Provia 400 has quite good reciprocity failure characteristics. I want to 
>expose as long as possible to catch as many as
>meteors as possible. A film with bad reciprocity failure allows much 
>longer exposure before the sky-background becomes
>too bright. The meteors expose themselves only for a very short time, so 
>you donīt need good reciprocity failure
>characteristics for them...
>
>a good film for meteor photography is NOT a good film for deep-sky work
>
>Any experience with the "improved" Fuji 800 color-negative?
>
>with best regards
>
>Philipp Salzgeber


Philip Perkins - philip@astrocruise.com
Wiltshire UK & Luberon France
Astrocruise - http://www.astrocruise.com


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