Camera overheating

mattd85

mattd85

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Matt
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Can anybody help me on this, I'm trying a star trail outside but after 6 frames at 25 sec exp my camera is saying its overheating?? I've ha to turn it on and off to get it going again??

Anybody else exp this? The cam is a Sony alpha 100.......oh and it's freezing outside?

Matt
 
Is it a CCD or CMOS sensor on those (sorry I'm Nikon)
I know on my older Nikons with CCD sensors, if I did startrails the sensor would overheat and cause purple edges to the pictures. CMOS sensors are not prone to this.
I think Nikon use (or used) Sony sensors as well so could be the same thing.
 
I will have to double check but upon inspecting the images it did have the purple edges :(
 
MWHCVT said:
I've never come across such and issue :eek: did you have long exposure noise reduction on??

Matt
Click to expand...

Hmmm The noise reduction in camera was turned on, same thing no doubt, I will try turning that off next time :shrug:

Matt
 
mattd85 said:
Hmmm The noise reduction in camera was turned on, same thing no doubt, I will try turning that off next time :shrug:

Matt
Click to expand...

I always have it switch off, you really don't need it especially with stacked star trails as the stacking process cancels out quite a bit of the noise :thumbs:

Matt
 
Tried some star trails last night (it was reasonably clear to start with) and was doing exposures of 10, 20 and 30 mins. I noticed I had pink edges to the pictures and put that down to the lens hood :shrug:, clearly this was more to do with overheating :eek: - hope I've not done any long term damage :help: :bang:

The only thing I did notice is that the battery doesn't last long when playing with exposures this long :bang:
 
skiking said:
Tried some star trails last night (it was reasonably clear to start with) and was doing exposures of 10, 20 and 30 mins. I noticed I had pink edges to the pictures and put that down to the lens hood :shrug:, clearly this was more to do with overheating :eek: - hope I've not done any long term damage :help: :bang:

The only thing I did notice is that the battery doesn't last long when playing with exposures this long :bang:
Click to expand...

To be honest in this country unless really out in the wilds e.g. Outer Hebrides or Scilly isles your not realistically going to be able to do long exposure star trails your far better off with shorter exposures and then stacking them :thumbs: for more information it's best to read my guide on star trails linked in my signature and the OP :thumbs:
 
skiking said:
Tried some star trails last night (it was reasonably clear to start with) and was doing exposures of 10, 20 and 30 mins. I noticed I had pink edges to the pictures and put that down to the lens hood :shrug:, clearly this was more to do with overheating :eek: - hope I've not done any long term damage :help: :bang:

The only thing I did notice is that the battery doesn't last long when playing with exposures this long :bang:
Click to expand...

You're not likely to have done any permanent damage to the sensor - it's just something that happens when they get hot.

A 30s exposure if like taking 14000+ images at 1/125s so it's hardly surprising your battery doesn't last long :D

Before anyone gets all technical: I know it's not really like taking 14k pictures as far as power consumption goes as during a long exposure you're holding the shutter open rather than opening and closing it again (which takes more power) but the comparison was for illustrative purposes only :)
 
MWHCVT said:
To be honest in this country unless really out in the wilds e.g. Outer Hebrides or Scilly isles your not realistically going to be able to do long exposure star trails your far better off with shorter exposures and then stacking them :thumbs: for more information it's best to read my guide on star trails linked in my signature and the OP :thumbs:
Click to expand...

What about the Dark Sky park in Scotland, still no good?
 
DuncanDisorderly said:
Google shows quite a few overheating problems on Sony cameras generally.
e.g. http://www.engadget.com/2010/09/29/sony-a55-a33-video-recording-limited-by-overheating-sensor/
There's a few hits on the A100, so you are not alone.
http://forums.dpreview.com/forums/read.asp?forum=1037&message=36084285
Click to expand...

It's true there was a specific overheating issue with the a33/55, when videoing with IBIS on, but this was fixed in later models.

Interesting that the a100 thread mentioned changing the battery. Might be worth a try.
 

Star trails (with aeroplanes) by david.williams221162, on Flickr[/IMG]

Stacking is the way to go :D

Suburban North London sky where the sky is a dreadful orange colour. Lots of 30 second exposures stacked with free software (don't remember which one). Shot small RAW files and adjusted the WB before converting to jpg and stacking.

David
 
graphilly said:
What about the Dark Sky park in Scotland, still no good?
Click to expand...

You should be okay :thumbs: there is a map somewhere out there on the internet showing light pollution levels in different areas but yeah I'd expect the more remote areas of Scotland to be fine :thumbs:

Matt
 
skiking said:
Tried some star trails last night (it was reasonably clear to start with) and was doing exposures of 10, 20 and 30 mins. I noticed I had pink edges to the pictures and put that down to the lens hood :shrug:, clearly this was more to do with overheating :eek: - hope I've not done any long term damage :help: :bang:

The only thing I did notice is that the battery doesn't last long when playing with exposures this long :bang:
Click to expand...

D200 uses the same sensor as the D80 which I used to own. Its a CCD sensor and does suffer from heating quickly causing the purple / pink edges.
Once I sold my D80 and got a D90 (CMOS sensor) the purple tinge stopped.
Its not the hood or anything like that causing it - it is a well known issue with CCD sensors
 
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