From: Alan Friedman <alan@greatarrow.com>

Date: July 15, 2009 10:38:03 AM MDT

To: Astro_IIDC@yahoogroups.com

Cc: macastronomer@yahoogroups.com

Subject: Re: [Astro_IIDC] I think this is my best Jupiter image so far!

Hi Terry,

I sent a response to one of your earlier posts from vacation but I don't think it made it through. Milton brought up the issues of working with an analog camera and the compression pitfalls that limit the results using IMovie for planetary imaging. I'd suggest going this route:

DMK21AF04 firewire camera (60fps - 15fps on 41 series camera is too slow for Jupiter)

IR blocked RGB filters Astronomik work well)

color filter wheel - manual rotation is fine.

Astro IIDC for camera control

home in Florida (you have that, lucky dog)

The last time I used my astrovid for imaging was at the Venue transit:

http://www.avertedimagination.com/img_pages/venus_transit.html

it works, but a digital firewire camera will remove many limitations and let you get the best from the fine seeing at your location.

cheers,

Alan

On Jul 15, 2009, at 11:07 AM, Terrence Redding wrote:

Tim, I am not familiar with the camera you used - but assume it is a color firewire camera.  I notice they have them from 80 fps down to 7.5 fps.  I assume the higher frame rates are needed to freeze the rapid rotation of Jupiter, something like a 9.5 hour day.

But I would appreciate hearing comments on which cameras are best for which applications.  I am also interested in inserting a date/time stamp on the individual frames to support photometry.  Is there a system for doing that with firewire?

Terry - W6LMJ

Terrence R. Redding, Ph.D. RTN

http://olt.net/learningstyle/Site_2/Learning_Style_Research.html

How do amateur astronomers learn?

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On Jul 15, 2009, at 9:47 AM, Tim wrote:

But I forgot to check the "notify" box when I uploaded it, so here it is:

http://f1.grp.yahoofs.com/v1/0NJdSpsXT-XxZMm72Mhg! puzbRAOXrQTTduGcNu8Khts6IpdHmAiBUm7_bZZeoHz8JAEOkhaiV0sK6gNeUXVWNtcu5gsVGk_duPaZyE8h165r/Planetary/2009-07-15_121502_UT_TJP.jpg

I've just started stacking the movies, and I shot a bunch of movies. This was the first one processed.

For some reason, Astro IIDC is showing 0 frames at the 75% confidence level, with all 1001 frames represented by a single spike. So for now, until I figure out why, I'm letting it stack all the frames (the seeing was pretty good, after all).

-Tim.