From: "Milton Aupperle" <milton@outcastsoft.com>

Date: November 4, 2007 11:10:41 AM MST

To: Astro_IIDC@yahoogroups.com

Subject: Barlows and Mars

Hi Folks;

With Mars fast approaching it's final close approach for this decade

(max 15.9 arc seconds on Dec 18th), I was wondering if people have any

comments on the barlows they use for long focal length imaging?

I have been using an Antares three element 2x multi coated achromatic

Barlow, which seems to work okay but I do get some color fringing. So

I'm thinking about maybe replacing it with a TeleVue 2.5x Powermate.

Anyone else care to share an opinion?

Thanks in advance..

Milton Aupperle