Re: [ATM] beginner's questions

["Jan van Gastel" <jhm.vangastel@wanadoo.nl>]

But half an inch on a 28 incher is only 0.04 magnitudes gain, which nobody 
can see. And 0.2 inch on a 6" is  0.07 magnitudes gain, which will also not 
be noticable.

Jan
http://home.wanadoo.nl/jhm.vangastel/Astronomy/


----- Original Message ----- 
From: "Mitchell R" <funnybone101@embarqmail.com>
To: <atm@atmlist.net>
Sent: Thursday, January 03, 2008 1:06
Subject: Re: [ATM] beginner's questions


>
> Enhanced are certainly worthwhile if done correctly, particularly for a
> smaller mirror.
>
> Dave
>
>
>     Everything you said was excellent advice but isn't the last statement
> reversed? The larger the mirror, the more the extra reflectivity helps. I
> remember a page on a coater's website. A 4 or 6 inch with enhanced only 
> adds
> the equivalent of .1 or .2 inches while on a 28 inch mirror it's like 
> adding
> half an inch. Those numbers aren't exact but the trend is the same.
>
> Mitch
>
> _______________________________________________
> ATM mailing list http://www.atmlist.net/
> 


_______________________________________________
ATM mailing list http://www.atmlist.net/