what went wrong?

wez130

wez130

wez130

Soldato
Joined
31 Jan 2004
Posts
11,316
Location
Matakana New Zealand
As in D, i tried a long exposure of ISS and endeavour, 45 minutes to be exact, set cam to F/22 and ISO to 100 then set up bulb, manual focus to infinity and obviously set up on tripod and remote cable release, result......

this...............
supposedshuttle.jpg



so what went wrong?

ps, hoping for any answers before 12.05am for next passing :D
 
Dirty sensor and no noise reduction. If you hve a noise reduction facility on the camera.. turn it on. It will take an image with the mirror up, and subtract the noise generated from the actual image. Should help a bit.
 
The exposure time was way to long? and there was a lightsource nearby?

For an exposure that length it needs to be absolutely pitch black. I plan on going out in a little bit to try and get some shots.
 
1. What camera is it?
2. Long exposures of the sky require the sky to be clear of clouds and local land to be producing NO light what so ever.
3. Cover up the entrance to the view finder (eyepiece) as your eye is not up against it so you will let light in via the viewfinder causing it to fog.
4. Give ye olde sensor a upside down blow with the rocket.
5. You have a flare problem which obviously is light local to you causing the image to flare and fog
6. Your sensor appears to be getting very hot so I would use long exposure noise reduction which say you take a 10 min shot will once that is done take another 10 min shot with the shutter down to produce hot pixels and remove them from the original image as it knows these are not image details (as messiah said)
 
Fstop11 said:
1. What camera is it?
2. Long exposures of the sky require the sky to be clear of clouds and local land to be producing NO light what so ever.
3. Cover up the entrance to the view finder (eyepiece) as your eye is not up against it so you will let light in via the viewfinder causing it to fog.
4. Give ye olde sensor a upside down blow with the rocket.
5. You have a flare problem which obviously is light local to you causing the image to flare and fog
6. Your sensor appears to be getting very hot so I would use long exposure noise reduction which say you take a 10 min shot will once that is done take another 10 min shot with the shutter down to produce hot pixels and remove them from the original image as it knows these are not image details (as messiah said)
Click to expand...

And theres me thinking he dropped the camera! ;) Oh, I wish I was technically gifted as some of you!
 
wez130 said:
As in D, i tried a long exposure of ISS and endeavour, 45 minutes to be exact, set cam to F/22 and ISO to 100 then set up bulb, manual focus to infinity and obviously set up on tripod and remote cable release, result......

this...............


so what went wrong?

ps, hoping for any answers before 12.05am for next passing :D
Click to expand...

its called the "twilight zone".

canon 10d , but time for exposure says 1780 that about 29 mins and .666 seconds some where in there you lost 15 mins of your life ,,


seriously try a couple of 3 min exposure and has been said try a rocket blower and noise reduction.
 
No real need for a 45 min exp either...

Aim for 10mins at first, with LENR, then 15 with LENR (so they'll take 20 and 30 mins in real terms)

If you feel you really need 45mins, bear in mind that enabling LENR for such a time will mean the whole shot takes an hour and a half. And this will eat the battery on your camera :p
 
thatnks for the advice guys, i really do need a rocket blower lol.

Ok it was 30 minutes exposure then - seemed about 45 lol :D

I'll try again tonight, though i don't have a rocket blower to clean my sensor :(
 
wez130 said:
thatnks for the advice guys, i really do need a rocket blower lol.

Ok it was 30 minutes exposure then - seemed about 45 lol :D

I'll try again tonight, though i don't have a rocket blower to clean my sensor :(
Click to expand...
I was out at the lake a couple of days ago and I noticed in my image preview a huge! hair on my image. I didn't have my rocket blower. Just hold the camera high above your head upside down and gently dry blow air onto the exposed sensor. It worked a treat for me. You can deal with the dust spots but those hairs have to go.
 
Thats dirty man. I must say I bought a 400d on the merit of the sensor cleaning although i've already got dust spots and I haven't even posted a picture on here yet!

I was going to get a D80 but lack of sensor clean type thing put me off. Now wish I had as the kit lens was so much better.
 
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