From: Milton Aupperle <milton@outcastsoft.com>

Date: September 19, 2010 4:51:12 PM MDT

To: Astro_IIDC@yahoogroups.com

Subject: Re: [Astro_IIDC] First light Flea2

Hi Jim;

On 19-Sep-10, at 2:12 PM, jimchung2338 wrote:

It was supposed to be clear all night during the Ganymede transit on Saturday morning, but of course it was not.  It finally cleared after 3 AM and I just managed to capture some Jupiter data while it was descending behind my neighbour's tree.  I'm still working on that data but the Flea2 seems to be significantly less light sensitive than the Flea despite both having the same Sony ICX204 ccd.  Any thoughts on that Milton?

We are comparing same type of CCD (Mono to Mono) right? Color CCD's will be a lot less light efficient as they have the Bayer RGB filters on the CCD.

About the only things that could be different is the Gain levels or possibly glass cover plate.

Gain isn't CCD dependent, it's FPGA / Processing dependent. So a gain of 100 on one camera may not be the same as the gain 100 on another.

Or perhaps the cover plate glass is different?

Anyway, here's the Sun from today, lots of activity.

http://dl.dropbox.com/u/4852049/SunSept192010b.jpg

Nice image.

I saw the sun briefly on friday, first time in 3 weeks. One of the wettest falls I can remember in 20+ years.

I see Alan got to use the Mt. Wilson 60-inch telescope over the weekend too:

http://spaceweather.com/

Nice shot of Jupiter.

Milton J. Aupperle