Cool your Canon

FOOTPRINT · #1 07-01-2006, 03:58 PM

Hi All,
Got tired of trying to remove the noise from long exposures with the Canon, at our 27-28 Deg. night Temps. so devised a very simple cooling system, which works, at 27 C. it will take you to 10 C. where the noise isnt too bad, these tests were done during daytime, somewhat warmer.

cheers..Jim

Striker (Tony) · #2 07-01-2006, 04:24 PM

Well done Jim.

I too am I working on a prototype Peltier cooled bag...just connected the peltier heatsink and fan together just 5 mins ago...all to run of 12 volt.

Not sure entirely how I am going to get it to work but gives me something to work on....total cost of everything so far is only $20...so nothing lost.

Dennis · #3 07-01-2006, 05:10 PM

Fantastic idea Jim - thanks for posting.

Cheers

Dennis

FOOTPRINT · #4 08-01-2006, 10:43 AM

Hi All,
Thanks for the comments, and Striker well best of luck, I tried a Peltier and had it bolted directly to the 1/4" mount thread, but found that it could not cool the whole camera (required as the CMOS chip is a long way in) the Peltier went down a good 20 C. below ambient, but as the Camera is of Plastic construction theres not much thermal conductivity, anyway it will be interesting to see your results, I used a large heat sink- no fan (to get away from vibration) and that bit worked well, unless you control the current to the Peltier it will run-away, I t did some tests to find the optimum Voltage/Current for stable operation and left it at that (6 V. at 2.1 A on a 12V Peltier) another way to go is stack the Peltier devices, a smaller one on the main Peltier, this will bring down the Temp. a lot more, but requires more Watts from your power supply.

cheers.Jim

P.S. look at www.melcor.com

Striker (Tony) · #5 08-01-2006, 11:10 AM

Jim,

I am hoping that with the 20DA because it has a magnezium body which should cool a lot better then plastic....anyway it's a bit of fun with virtualy no cost so I will give it a go.

I wil keep you up to date...I would like to have something working before Lostock.

tornado33 · #6 08-01-2006, 11:47 PM

Be careful of condensation folks. If the inside drops below the dew point condensation might occour inside the camera.

Striker (Tony) · #7 09-01-2006, 01:47 PM

Taken onboard Jim.....I would be happy if it could drop the temp from ambient 25 to 10 degrees....a 10 to 15 degree drop should be fine...I hope.

Striker (Tony) · #8 09-01-2006, 05:17 PM

Jim,

I got the peltier cooling a very small foam enclosure something similar to what the camera would be in.....it failed miserably.....it was lucky to cool it more then 7-8 degrees after 15 minutes.....like you said it created lost of moisture which I did not like.

I had a heatsink with fan as pictured above but I also put a small 44mm fan on the cool side to blow the cold air into the enclosure.

It Failed to imprese me....

I will look for alternatives now....Peltier idea is gone forever.

Was a bit of fun and also learnt something....so no harm and was a bit of fun.

"perfect working Peltier device for Digital camera for sale...lol"

FOOTPRINT · #9 11-01-2006, 10:10 AM

Hi Tony,
Too bad you couldent get your idea to work, it looked good, I tried the direct approch (pix attd.) with no fan, cooling plate directly bolted to the Camera Base, allowing enough space for insulation between the Heat-sink and the Camera, and the Camera enclosed in foam insulation, taped the Temp. sensor to the Camera Body, but likewise I couldent get more than 8 Deg. C. change, the inside of the Camera may have been cooler ???, but I gave the idea of Peltier Coling the Canon away in favour of the Ice water circulator method.

regards......Jim