From: Mark Gaffney <markgaffney@me.com>

Date: January 21, 2010 6:00:29 PM MST

To: astro_IIDC@yahoogroups.com

Subject: LRGB filters..

I`ve done a brief comparison of 1.25" Astrodon E series 2 LRGB & the Baader ones (LRGB) both the mounted types, by consulting the additional information supplied on the Opt site (for the Astrodon`s) & Telescopes.com for the Baader`s. The Astrodon`s are a good deal more expensive- $450 USD from Opt + postage for me (in Australia) & $635 AUD from the Australian distributors! The Astrodon`s are "more parfocal" especially for Kodak sensors. There`s supposed to be "virtually no internal reflection" with them. The Baader LRGB`s are $349 USD or $387 AUD (for me) + postage. The Baader`s supposedly "eliminate the annoying reflections present in other filters". It`s not clear of course whether this applies to the more expensive competition..! I don`t know if I can make head nor tail of Milton`s link yet with it`s supplementary links? I haven`t looked at any of these extra links yet, thinking they`re probably too technically minded for me..?

Mark.