[APML]: Re: [APML] Help

[John Lumpp <jrl@spec.specdata.com>]

I'm having a problem with deep sky photos using my 12" LX F10. I tried to 
use the 6.3 focal reducer to reduce exposure times and make guiding 
easier.The results were terrible.I had severe vignetting(central glow) in 
the center of the print with a darker outer region.I live in area of 
considerable light pollution.I used un-hypered fugi 800 and even at 5 
minutes of exposure the problem occured.I'm thinking that the reducer can 
only be used for visual work.If anyone has experience using a setup 
similar to mine I'd like to know.I'm also using a JMI moto focus before 
the reducer with the Taurus camera attached to the 6.3 reducer.I'm not 
sure if that matters.I seem to be wasting alot of film and time.Any help 
on this would be great. John L.