Michael Evans replied to the topic 'Automatic Offset Calculation' in the forum. 3 years ago

I am a bit late to the discussion but I read the thread a few days ago and decided to try the method of finding the optimum offset suggested by rbarberac.I set up on the bench an ASI533mc pro osc camera connected to a powered usb hub plugged into an rpi4 running Stellarmate 1.5.8. Communication between a Macbook air and the rpi was by wifi using external antennas on both the mac and the rpi4.First I connected to the Stellarmate by novnc. Using 30 sec exposure screenshots for a 100 offset and 0 offset.P { margin-bottom: 0.21cm }  are attached.As can be seen there is not a lot of movement along the x-axis of the fits viewer.This would indicate that the change in offset is not being applied to the camera although in the indi control panel for the camera it is shown to have changed. Due to my inexperience I suppose I have not set a parameter to a good value or not pressed a tab somewhere. Can anyone suggest where I am going wrong please?Meanwhile I thought about accessing the camera using Kstars on the Mac. Here are the results of a 100 and a 0 offset. In the screenshots attache the histogram can be clearly seen to move along the x-axis of the fits viewer, as expected, allowing optimisation of the offset.The other curious thing is that the frequency and intensity scales in the 2 cases,one using vnc and the other using Kstars on the Mac, are different. Shouldn't these be close in values? What am I missing?My thanks in advance for any suggestions.P { margin-bottom: 0.21cm }
 

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