Here is one of my 10 minute subs taken at Riberac.
I don't know exactly what went wrong, but I suspect that moisture condensed on the CCD window and froze. It happened immediately after I opened the sealed bag to change the battery.
(http://gallery.orpington-astronomy.org.uk/albums/userpics/10046/OrionProblem.jpg)
Mark
ummm bummer.... Did you get any good subs? Has the camera worked since?
John
:o
I AIN'T MODDING MINE NOW!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Tony G
PS.................Only joking Mark. Hope everythings OK.
Standard batery is only 720mah, how about higher capacity battery - 2000mah ?
http://www.batterymill.com/shop/DIGITALCAMERAS/CANON/5649 (http://www.batterymill.com/shop/DIGITALCAMERAS/CANON/5649)
blimey :cry:
Here's the first light from my second Canon 350D.
No this is not a new nebula - it was caused by dew forming on the CCD cover glass - the cooling was down to 21C below freezing - ambient air temperature 7C.
It's very red because I was using a clip-in Ha filter. I couldn't see any stars through the viewfinder so I had to open the camera out in the garden to remove it for alignment purposes. Although the peltier was not yet switched on it allowed damp air to enter. Clearly, I will need to perform all alignment with the finderscope in future.
(http://gallery.orpington-astronomy.org.uk/albums/userpics/10046/pelterproblem06122009.jpg)
There's a definite pattern forming here - whenever I've opened up the camera "in the field" it has caused misting. All other experiments have been fine.
Here's a question: why doesn't the cover glass on a dedicated astro-CCD suffer similar misting problems?
Anyway, I managed to get a later version of Nebulosity connected to PhDGuiding to give me dithering. According to the release notes, the version I was previously using had a bug which prevented the dithering.
Mark
Quote from: MarkS on Dec 07, 2009, 06:10:02Here's a question: why doesn't the cover glass on a dedicated astro-CCD suffer similar misting problems?
It does from time to time. I've had one or two occasions when a small patch of moisture has formed over the CCD. Strangely it only forms directly over the point of the CCD and nowhere else. I think on all occasions it is where some moisture was already inside the camera (camera put into case on a dewy night and small amount of water inside the case).