Quote:
Originally Posted by glend
Rowland your comment regarding older dslrs running cooler - what is that based on? Is there a list or reference somewhere? I'd like to know how hot my 450D gets.
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Me too: but I have tried this experiment this morning:
Using a 350D (the CMOS from Canon), I used a block of polystyrene and made a plug to sit over the T-Ring and inserted a temperature probe through that and into the camera - as close to the mirror as I could without fouling it. That's the best I could do to get a reading of the internal temperature of the camera - as isolated as I could make it from the outside air.
I then ran a series of 50 x 30 second subs back-to-back (I only had a USB cable with me and not the DSUSB that is in the obs) and finally a series of open BULB exposures of 300 secs by manually holding down the shutter. Ambient was 21.75 give or take. The temperature inside the camera did not exceed 22.4 in either series of tests.
I concede I may not have isolated the probe from ambient as well as possible but even allowing for that, the internal temperature did not rise more than about 0.75C above it. So I'm inclined to think that internally generated heat will not be much more than 1C. That is encouraging for my cooling box plans.
Peter