Re: Leonid Meteor Shower

[Sofjan@xxxxxxx]

In a message dated 11/15/98 10:02:07 PM Eastern Standard Time,
indepth@xxxxxxxxxxxxxxxx writes:

<< 
 	I'd like to expose as long as possible without getting into base fog.
Anybody have specs at hand for various transparency films. I'll be shooting
everything from 35 mm, 6x7, 6x12, 6x17 and 4x5. >>

      Base fog or your local sky limit is close to unpredictable.  You could
use somebody else exposure time as starting point. Most likely you have to
find out for yourself. and from the different format you ask for, it is almost
impossible to supply for all the base fog. 
     Usually Astrophotographer talk about base fog or sky limit with two
number first will be the length of the exposure before the base fog started to
show on the negative/film. Second will be the limiting magnitude or the
dimmest star you could see with naked eye. this two together with local sky
condition (hazy, steady ... turbulence ... , etc.) then base fog number will
be really meaningful. 

     But on photo of meteor you basically point your camera toward a sky or
wide angle camera toward a scene opening the shutter hoping that the meteor
will streak by.  My last attempt was mounting my camera on my Byers camtrak.
pointing it f 1.7 btw) star constellation.  Open the shutter at f 2.8 for at
least 5-10 minutes (ASA Fuji Sense 100) .  They comes out pretty good.  My
comet Hyakutake and Hale Bopp are done the same.  
     
     I don't know how would you be able to do thjis in panoramic though ???
8^)

Sofjan Mustopoh