arun289

Thanks! Regarding the exposure time, it depends on the focal length of the lens... For 18mm and less it was around 2-3 minutes. For 50mm around 1-2 minutes For 135mm 15 seconds. Better build quality will increase these times at least by a factor of 2. Please do let me know if you need any help with the Arduino coding. Regards, Arun

Hi, I would like to share my design of a smart barn door tracker. It is a simple to build isosceles barn door tracker with tangent error correction through a Arduino micro-controller. I have shared all the details about the tracker including the mechanical design, electrical circuit and the software source code here: https://barndoor.spa...ference-design/ If you are interested in the math and other details about a barn door tracker, more details are there in the blog. Also find an online calculator which helps in calculating various parameters while designing a barn door tracker. The blog is here: https://barndoor.space/ M46 and M47 shot with this tracker. 135mm lens, ISO800, 15sec X 200 subs (50 minutes) exposure. Cannon 500D. Comments and suggestions most welcome! Regards, Arun