|
In the work Rowland did on cold finger cooling of Canons, it was determined that there was no point trying to cool the sensor below zero - no further impact on Dark quality. Even though my cold finger 450D can drive down to near -20C, i usually stop at -5C.
If your imaging in winter, when nights can get pretty chilly out at dark sites, there is not alot your going to gain; in fact i have run my Canon in winter with just the fan cooling the cold finger. However, in rhe heat of summer the TEC needs full power to get below zero.
You do need to put a temp sensor on, or as close to as possible, the sensor. Never rely on the RAW image header temp data, as that is recorded inside the camera processor not at the sensor.
|