Quote:
Originally Posted by pjphilli
Hi Gary - Courageous indeed to delve into you Canon with such a mod!
But tell me - if you get your cold finger down to -4 degrees and your ambient is at 22.5 then isn't there a danger that you are cooling below the dewpoint and that you may get condensation on your CMOS imager or within the camera? Cheers Peter
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Hi Peter,
Most probably will get condensation, was just a quick test so didn`t have time for the dew to build up. I have yet to make a silicone dissecant system for the camera to suck out the moisture. Next part to do .
Quote:
Originally Posted by mill
Gary it looks like you didnt isolate the cold finger at all.
That way you ask for trouble, moisture will stay on uncovered metal and this way also on the chip.
This way it will end up on your components.
It is better to put some tape on top of the cold finger and thin silica gel bags in every part they will fit.
It is best to leave a part of the cold finger outside of the camera bare so the moisture will settle on that part and not in the camera.
You could also spray the circuit boards with a circuit board laquer so moisture doesnt short out anything that easy (that is what i did before the mirror motor burned out), this way i could go to -7C.
The ccd cameras sold have the boards with a layer of laquer on it and the bare parts of the cold finger is used to collect the dew that is still there.
Hope this helps a bit.
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Thanks Martin, The cold finger is totally insulated, I just took the photo after I cut it out. It has two layers of electrical tape over it and a little foam tape under it on the left of the cmos as well. Also electrical tape over the ribbon connectors to the cmos as well..Didn`t take a pic then but.
cheers Gary