[APML]: PPF400 exposure time

[byen@ix.netcom.com]

Hi Robert,

  I also use a Celestron 8" f1.5 Schmidt Camera, both color & TP films.  
I typically use 4 min on Hyp 2415 and Fuji Super HG400.  This weekend 
will be my 1st try at using PPF400 color film, on Hale-Bopp.  I'm 
guessing around 2 min for exposure time, and will bracket around this.  
Have you used this film & "zeroed" in on an exposure time?  Do you use a 
roll film holder (I don't).  

  I found your homepage informative.  See mine at 
http://www.primenet.com/~boobyen - there are some Schmidt shots there.

 Many yrs ago, I used a Meade 8" SC as a guide scope.  Now, my 8" (or 
5.5") rides piggyback on my AP 5" f8 EDT refractor (guidescope), on a 
G11 mount.

   There was some guy Mike Sisk (I think), who had a photo with a 16" 
(?) Schmidt camera in Deep Sky, few yrs ago.  He's in Oklahoma (?).  
Know of any bigger Schmidt cameras available?


Bob Yen