[AZ-Observing] Eclipse Photo and Processing Hint
- From: Andrew Cooper <acooper@xxxxxxxxx>
- To: AZ-Observing mailing list <az-observing@xxxxxxxxxxxxx>
- Date: Tue, 11 Jun 2002 00:25:24 -0700
I observed the eclipse from Avra Valley with my 8" LX50 and a full
aperture filter. I also used a digital camera to shoot a few frames
(about 80+) and was quite pleased with the results. Most of the time
the autofocus and autoexposure worked well, but I also tried focusing
manually, with the camera focus disabled and a bit of exposure
bracketing.
http://www.whitethornhouse.com/dropbox/Eclipse20020610a.jpg A photo
from after max, but some nice sunspot groups back in view.
A hint on processing your digital photos...
The photo above was processed only using a "levels" adjustment, I used
no sharpening techniques. I brought the black level up, WAY up, until
the edge of the Sun began fade too much. This really sharpens up the
edge and brings out the detail in the penumbras of the spots as the
display range can now show something more subtle than black and sun.
This also helps with the limited range of colors in the sun, resulting
in a false banding of various shades of orange. I brought the white
level down a bit, but too much and the nice orange color fades too much
towards white.
The camera was a Nikon 995, afocal through a 35mm Panoptic, all settings
auto for this photo.
Andrew
--
Andrew Cooper
Tucson, AZ
mailto:acooper@xxxxxxxxx
http://whitethorn.house.home.att.net
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