From: Alan Friedman <alan@greatarrow.com>

Date: November 14, 2005 10:13:17 AM MST

To: Astro_IIDC@yahoogroups.com

Subject: Re: [Astro_IIDC] Mars image Nov 13/05 - advice?

It's amazing to be able to image mars at all with 76mm of aperture - nice work! 120ms exposure is quite long, it would take good seeing not to have blurring come into play. Thanks for posting the image.

best,

Alan

On Nov 13, 2005, at 2:10 AM, jimchung2338 wrote:

Hi all,

This is probably my best attempt at imaging Mars through my 17 year old TV 76mm

Oracle refractor - a triplet apochromatic. I simply cannot get any more detail and I

think the focus is optimized as is the brightness. Is this simply a function of small

aperture?

Again taken through a 5x Powermate at approx f37, 120 ms exposure stacking at

80% confidence level with a Unibrain webcam. BTW there was some discussion than

the Unibrain has a nonstandard thread/size and I know for that reason that Mogg

won't make an adaptor for it. I found some plastic electrical conduit threaded pieces

that you screw directly into the webcam case (after removing lens assembly) and

some light sanding brings it 1.25 " size.

http://groups.yahoo.com/group/Astro_IIDC/files/Planetary/marschung2.jpg