Re: [Utah-astronomy] White balance / charge your batteries
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 _______________________________________________ Utah-Astronomy mailing list http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy
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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
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
_______________________________________________ Utah-Astronomy mailing list http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Send messages to the list to Utah-Astronomy@mailman.xmission.com The Utah-Astronomy mailing list is not affiliated with any astronomy club. To unsubscribe go to: http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Then enter your email address in the space provided and click on "Unsubscribe or edit options".
On 19 May 2012, at 00:08, Joe Bauman wrote:
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?
At this point I just don't know. I used the exact same setup and equipment for the Sun shots I made with film but did not have the problem then. Since I don't need to worry about the corona I'm also going to try without the telecompressor.
Were these jpgs when you took them?
Yes. "Normal" resolution. I'll also try high resolution and then raw and see if that makes a difference. More on this closer to sunset this evening. patrick
Joe, et al, Looks like changing from "normal" to "fine" resolution did the trick. http://users.wirelessbeehive.com/~paw/temp/suntest02.jpg Not getting the detail I'd like but I'm shooting off aperture which only gives me 50mm clear aperture. But I've come to accept that no matter how much effort I put into such "pretty pictures" better ones will always show up in S&T. :) patrick On 19 May 2012, at 00:54, Patrick Wiggins wrote:
On 19 May 2012, at 00:08, Joe Bauman wrote:
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?
At this point I just don't know. I used the exact same setup and equipment for the Sun shots I made with film but did not have the problem then.
Since I don't need to worry about the corona I'm also going to try without the telecompressor.
Were these jpgs when you took them?
Yes. "Normal" resolution. I'll also try high resolution and then raw and see if that makes a difference.
More on this closer to sunset this evening.
patrick
Really nice, Patrick! ________________________________ From: Patrick Wiggins <paw@wirelessbeehive.com> To: Utah Astronomy <utah-astronomy@mailman.xmission.com> Sent: Saturday, May 19, 2012 4:48 PM Subject: Re: [Utah-astronomy] White balance / charge your batteries Joe, et al, Looks like changing from "normal" to "fine" resolution did the trick. http://users.wirelessbeehive.com/~paw/temp/suntest02.jpg Not getting the detail I'd like but I'm shooting off aperture which only gives me 50mm clear aperture. But I've come to accept that no matter how much effort I put into such "pretty pictures" better ones will always show up in S&T. :) patrick On 19 May 2012, at 00:54, Patrick Wiggins wrote:
On 19 May 2012, at 00:08, Joe Bauman wrote:
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?
At this point I just don't know. I used the exact same setup and equipment for the Sun shots I made with film but did not have the problem then.
Since I don't need to worry about the corona I'm also going to try without the telecompressor.
Were these jpgs when you took them?
Yes. "Normal" resolution. I'll also try high resolution and then raw and see if that makes a difference.
More on this closer to sunset this evening.
patrick
_______________________________________________ Utah-Astronomy mailing list http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Send messages to the list to Utah-Astronomy@mailman.xmission.com The Utah-Astronomy mailing list is not affiliated with any astronomy club. To unsubscribe go to: http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Then enter your email address in the space provided and click on "Unsubscribe or edit options".
I believe I have seen those kinds of rough marks in photos where the intensity changes too abruptly for the type of image. I suspect the fact they are gifs instead of jpgs might be the problem. Why don't you try shooting them as jpgs, and also, don't overexpose -- some of the later ones in the test are badly overexposed, but of course, the point of the test was to figure out exposure. Best wishes, 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
_______________________________________________ Utah-Astronomy mailing list http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Send messages to the list to Utah-Astronomy@mailman.xmission.com The Utah-Astronomy mailing list is not affiliated with any astronomy club. To unsubscribe go to: http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Then enter your email address in the space provided and click on "Unsubscribe or edit options".
participants (2)
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Joe Bauman -
Patrick Wiggins