Hi Patrick, Humm -- could they be reflection artifacts, that is, something inside the tube reflecting? Are you certain no light gets in around the edge of the filter? It's strange. I don't think it's because of resolution. It has me stumped. Or maybe it's in the processing. Were these jpgs when you took them? Thanks for posting -- Joe ________________________________ From: Patrick Wiggins <paw@wirelessbeehive.com> To: Utah Astronomy <utah-astronomy@mailman.xmission.com> Sent: Friday, May 18, 2012 11:15 PM Subject: Re: [Utah-astronomy] White balance / charge your batteries Ok Joe I've posted an animated GIF with exposures ranging from 1/2000 to 1/30 (used for determining the best range of exposures), but now that I've been able to see them on the wide screen iMac I'm seeing problems I did not see on the much smaller MacBook. Biggest problem are the circles in the images. I'm thinking that might be because I didn't shoot at high enough resolution. Will try the same setup but with various resolutions tomorrow. http://users.wirelessbeehive.com/~paw/temp/suntest01.gif patrick On 18 May 2012, at 20:01, Joe Bauman wrote:
Will you post them, Patrick?
------------------------------ On Fri, May 18, 2012 7:11 PM MDT Patrick Wiggins wrote:
Just in case anyone else is having this problem:
This will be my first attempt to shoot an eclipse with a digital camera so I set up today and shot several images using a Nikon D70 attached to a C-5 with f/5 telecompressor and off axis solar filter.
The pictures were nicely centered and focused but there was no color. Nice B&W shots.
Never had that problem with film... :)
So I pulled out the owners manual and found a page on color balancing. Happily once I adjust the balance for "full sunlight" the color returned.
Also, a suggestion: Charge your batteries (something I nearly forgot to do). Laptop, camera, telescope drive power pack, whatever. Get them all charged before heading south Saturday.
patrick
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