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Reflex camera cooling by external connection to the tripod tapping base, Carles Zerbst

Reflex camera cooling by external connection to the tripod tapping base

Reflex camera cooling by external connection to the tripod tapping base, Carles Zerbst

Reflex camera cooling by external connection to the tripod tapping base

Description

Reflex camera cooling by external connection to the tripod tapping base.

The project is not to refrigerate a Reflex is that it simply does NOT heat up.

The improvement by reduction of the thermal noise in the photos refrigerated with this system is important.

To have a minimum performance, the assembly must be done so that the cooling system has direct contact with the inside of the chamber, either with the CMOS sensor when integrated cooling is done (cold finger in subsequent contact with the sensor) and obviously disassembling the camera.

Or indirectly, as is my method, by accessing from the outside, the camera must not be disassembled and the cooling system is transferable from one camera to another as is a tripod.

The cold finger to the tripod thread and from there to the internal metal housing of the chamber and along that way to cool the entire assembly, metal + metal contact and even thermal paste must be placed to optimize the transmission on the tripod thread

The results I think are very encouraging, in the absence of more demanding tests.

Comparison data:

Without Refrigeration:

5 Shots followed from 300 sec to 1600Iso without refrigeration, the first photo starts at 26ºc and the fifth photo of the series ends at 31ºc, temp. of the internal camera sensor.

With Refrigeration:

5 Shots followed by 300 sec at 1600 Iso with active cooling, starts at 18ºc first photo and ends 20ºc fifth photos of the series, temp. of the internal camera sensor.

In both cases the ambient temperature was 23ºc to 22.5ºc. before starting the 30 minute camera shots in stanby for acclimatization, without refrigeration and with refrigeration. Power supply 12V 5A.

I have used a commercial peltier kit, as the basis of the work and I have only modified the cold finger to be able to screw it to the base of the camera.

I add some pictures of the camera mounted on the RC and fully operational

The camera screen as I do not use it, I control the whole process from the PC with BakyardEos, I have it canceled and isolated with a rubber-aluminum coating + screen protector to avoid condensation and somewhat improves performance, less loss due to back, I have also mounted an integral neoprene cover on the Canon 1100D that isolates the environment and also less loss of cooling, I am not sure if it really brings improvements ... but we will see, I have already installed the PWM regulator with views to the cold season with on / off button and 0 to 100% regulator. Regards.

Comments

Revisions

  • Reflex camera cooling by external connection to the tripod tapping base, Carles Zerbst
    Original
  • Reflex camera cooling by external connection to the tripod tapping base, Carles Zerbst
    B
  • Final
    Reflex camera cooling by external connection to the tripod tapping base, Carles Zerbst
    C

C

Description: Comparison of the difference in thermal noise with and without refrigeration, we are seeing exactly the same area of the sensor in the upper right, the improvement is evident.
The hot pixels have practically disappeared and the noise plot is much smaller and more homogeneous. - Canon 1100D Modified Extended Spectrum.

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Histogram

Reflex camera cooling by external connection to the tripod tapping base, Carles Zerbst

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