09-07-2013 03:55 PM - edited 09-07-2013 03:56 PM
I've been trying to do star trail pictures the last few days. Every time I do, the batteries are almost dead by the time I turn it off, which isn't surprising, but there's no picture. I have a battery grip so I should have twice as much battery power as just one battery. Is there just not enough battery to record a picture after 6+ hours? I don't thing that's it because I can still press the playback button to look at the pictures to see there's no new picture. Why is this happening
09-07-2013 06:42 PM
09-08-2013 03:06 PM
Yes, I know the shutter is actually open, the camera is on, theres a card in the camera, the counter on the top screen starts counting seconds when I hit the cable release, ect.. At one point I went outside again to look and the counter showed "---" If that means anything.
6 hours might just be too long. I'll try shorter exposures.
09-09-2013 11:36 AM - edited 09-09-2013 11:41 AM
You should try to do multiple exposures at short duration (like 5min) then stack them later in post. It will help keep to noise down also. If the battery runs out before the exposure time end, it will not take photo from what I understand.
Check out this link: http://blog.starcircleacademy.com/startrails/
09-14-2013 07:21 AM
09-14-2013 03:06 PM
Ahh... star trails aren't made in a single exposure. If you do that, the sky will almost certainly wash out and become mud due to light pollution.
It's normally a LOT of 30 second exposures that you merge together.
Here's a video: http://www.youtube.com/watch?v=V6ypRbPzoPM
Incidentally, Canon makes an AC adapter ACK-E6 which will let the camera run off AC power (if you have AC power available where you plan to shoot.). This is how I run my 60Da (which takes the same adapter as the 5D III) when doing astro-photography (which typically means the camera is taking frames for hours and hours and would normally just kill the batteries.