Noise associated to warm sensor temperatures during long-exposure shots usually has an effect of turning a supposedly black region into noisy and grainy one. In a typical DSLR, thermal noise is further increased since a DSLR’s imaging sensor heats up during exposure, thus, causing its temperature to reach up to 10 deg C above ambient (reaching up to 35 to 40 deg C). By cooling down the sensor, it is possible to eliminate or somehow minimize this thermal noise.
Filter modified (Baader BCF) and Peltier-cooled Canon 450D
In this project, I will describe how I modified my Canon 450D DSLR to become a dedicated astronomical camera, with all functions intact including the auto-focus capabilities, and thus, may still be used for non-astronomical purposes. Read more.
I look forward to a great and more productive year ahead, especially that this season’s long vacation finally gave me ample time to upgrade my gear and work on my most ambitious project to date: a Peltier-cooled filter-modified Canon 450D DSLR. I will be posting a detailed article about this camera modification in the days to come.
Have a great year ahead!
My first prototype of a thermo-electric cooling system (or the Peltier module). I intend to use this module to cool down the sensor of my filter-modified DSLR to minimize noise. So far I was able to lower the temperature to 12 deg C, from an ambient of 33.2 deg C. This is still a work-in-progress.
To learn more about my ongoing astro-projects, click here.