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my sony alpha 100 keeps overheating
When?
Doing What?
Recording Video?
What Resolution?
After How Long?
Is Image Stabilisation turned on?
A little more information would be helpful if you are looking for a reply.
I think all DSLRs overheat when recording HD Video and that is why maximum recording times are set.
The Alpha 100 is not capable of video capture, but yes a little more info about when the problem is occurring would be useful.