[ATM] (no subject)

["Mark" <marco.miglionico@btinternet.com>]

to summarise then:

1) I've only avoided coma by looking at a smaller field size (which I could 
do with a shorter f.l. eyepiece)

2) The only gain I get is the benefit of longer eye relief from using my 
current eyepieces with the barlow, rather than have to
get shorter f.l. eyepieces.

I'll start saving for the Televue then. Or I could sell my car. A bit off 
topic but
how come there are 60 billion different eyepieces, reducers, barlows, relays 
and filters
from a million different manufactures in billions of tyes of glass/ 
configuration.......
and only 1 coma corrector???????? (That I can get my hands on in the u.k.!)

Marco Miglionico



>Yes, you'd be looking at a smaller FOV so the coma at the edges will be 
>less in terms of it's angle on the sky. However you've >also magnified the 
>view. In terms of coma nothing has changed by using the barlow other then 
>restricting your FOV. You could >do the same thing just by getting rid of 
>the barlow and using a higher power ocular.

>Tony 

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