Heres a shot I got of the tarantula neb. I think theres something going on with the sensor on my canon 30D. There seems to be a distinct line on the bottom of all the images and within this section theres some sort of strange vignetting. Has anyone seen this before?
So this one was shot using eyepiece projection to up the image scale a bit.
Bout 1 hour 47 minutes of subs (4 and 5 mins) stacked in DSS.
Pretty happy considering im just using an 80mm doublet.
Lovely!
I was determined to photograph this last night, but by the time I had set it all up and drift aligned, the clouds rolled in and sat in front of it for the next 3 hours. I gave up at 3:30.
It is clearer looking tonight, but I see lurking clouds and reckon they are taunting me.
Brilliant work with just an ED80. Looks a little on the blue side though?
Can you show some other examples of the mentioned problem with the sensor?
Thanx guys.
Peter, yes Im really struggling to get the colour correct after stacking. The single subs show lots of good colour, but when it comes out of DSS its grey and i have to up the saturation so much, i cant really control the color balance properly..
Heres an M83 i did last week that shows the sensor problem a bit more.
I Havant noticed amp glow before this image, im thinking i may have inadvertently got some red light in a sub..?? not sure.
ps. If that is amp glow, it might be related to the eyepiece projection, this was the first time i used that method and it hasn't shown up on any previous subs.
Here's some things to try-
cover view finder with red cellophane or tape when exposing - I had light leak that looked a bit like that,
Move camera USB or laptop connections away from power source- EM radiation from power boards etc can give you funny signals
Taking darks helps.
Still with all that I really like your M83- great shot!
Graz
