Passive air cooling for Canon 350D - 02 November 2011

I have decided to try another modification of my Canon 350D. The first modification was an original filter exchanging, the second one is about a passive air cooling.

There are two images. The first one is a dark frame without cooling, the second one is with cooling. I used 300 second exposure time and the temperature was 4 degree of Celsius during the whole experiment.

Dark frame without cooling

Technical information:
Optics:	-
Exposure:	5min
Camera:	modified Canon 350D
Contents:	Dark frame without cooling

with passive air cooling

Technical information:
Optics:	-
Exposure:	5min
ISO/ASA:	1600
Camera:	modified Canon 350D
Contents:	with passive air cooling

Test version of the modification. One side is open and there is a fan attached on the other side.

As you can see from the charts below, after initial phase of cooling down there is a stabile state. The average value of noise is lower and standard deviation is lower as well. The difference is about 50%. It is good result.