Re: [APML] Meteor Photography Questions

[RUSirius <parsec32@earthlink.net>]

I'm going to try some fuji superia 800 and kodak 3200 film.  My 50/1.8
lense shows aberation around the edges at 1.8 and 2.8 and it's sharp at
f4.  I checked into some specialty nikon lenses that are sharp wide open
but they are too expensive so I'll just live with funny looking stars I
guess.  Tony Hallas says use 400-800 speed film.  He didn't have any
specific recommendations.

> Alson Wong wrote:
> 
> I'm planning to shoot the Leonids with a 50/1.8 lens and a wide-angle
> lens (28/2.8 or 20/2.8) using Ektachrome P1600 on an equatorial
> mount.  Generally, the advice for meteor photography is to use the
> lens wide open and a fast film, but given the film's high reciprocity
> failure, stopping down the lens will allow me to triple the exposure
> time (calculated using Covington's exposure program) before running
> into sky fog along with providing sharper stars.  A similar effect
> applies for developing the film at ISO 800 instead of 1600.  What is
> the best combination of film speed and f-ratio, keeping in mind the
> high reciprocity failure?
> --
> Alson Wong
> Riverside Astronomical Society
>      http://www.rivastro.org/
> Visit my Web page at:
>      http://home.earthlink.net/~alsonwong/index.htm

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