Hi Patrick, Thanks for doing this. I'd like a kit. I have shot darks at the time of the exposure, sometimes one per exposure, sometimes one per set of three or four exposures, but I've never combined darks. Also I have yet to shoot a flat, though I know I need to do that. The problem with flats, as far as I am concerned, is that you have to use the same angle, focus, etc., as with the images you're correcting. But in the field it's not possible to shoot a bunch of pics of one target, shoot flats, then go to another target -- at least, that's my understanding. I think I need to shoot flats in the morning, using the latest target, but not a setting for an earlier target. Is that right? Thanks, Joe --- On Thu, 1/8/09, Patrick Wiggins <paw@wirelessbeehive.com> wrote: From: Patrick Wiggins <paw@wirelessbeehive.com> Subject: [Utah-astronomy] Tri-color samples To: "utah astronomy listserve utah astronomy" <utah-astronomy@mailman.xmission.com> Date: Thursday, January 8, 2009, 6:29 PM I spent some time collimating my scope last night after which I took a few test shots of M-1 which just happened to be transiting. Knowing there are some folks here on the list getting into astroimaging I made images for a "kit" that could help folks get a feel for what's involved in making color images. The kit contains: 1-Raw exposure with clear filter 1-Raw exposure with green filter 1-Raw exposure with blue filter 1-Raw exposure with red filter 1-Master dark to be used to reduce all of the raw images 1-Master clear flat for reducing the raw clear 1-Master green flat for reducing the raw green 1-Master blue flat for reducing the raw blue 1-Master red flat for reducing the raw red The master dark was made by shooting and median combining 15 darks. The master flats were made by shooting and median combining 15 each flats shot through the clear, green, blue and red filters. I should note that using the kit will not get you "Tyler like" images. Though the final image should look pretty good the main purpose of the kit is to show folks what's involved in making "real" color images (I say "real" as opposed to the one-shot cameras which, like color film, sometimes produce questionable colors). Let me know if you'd like a kit and I'll email it out. Clear skies! patrick _______________________________________________ Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Visit the Photo Gallery: http://gallery.utahastronomy.com Visit the Wiki: http://www.utahastronomy.com