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The camera is a Canon M running Magic Lantern. I am taking pictures with a Canon 200mm macro. Stars appear sharp and 1x. At about half full magnification on the display all stars including dim ones begin to show area. At full magnification all stars including dim ones show a definite circle. No stars are points.
My question is are there Magic Lantern settings that effect star sharpness or size on the M? I would like to adjust the image for the sharpest values. Thanks Dan

The camera is an EOS M1 and the application is astrophotography. After several attempts I have the basic operations in place and astrophotography is working. There is a remaining question; DOF settings remain active and there is a settable variable remaining "Circle of Confusion". The value is in um. The camera is in manual mode and the focus is set to infinity. Exposures are long, typically 30 to 90 seconds. The range of values are 1 um to 100 um.
In this case what is the effect of changing the Circle of Confusion value in astrophotography?

I have been using ML off on for several months. There appears to be a change in the intervalmeter operation.
The change is in the relationship between the 'take a picture every time' setting and the exposure time. The original operation seemed to be the 'take a picture every time' setting had to be greater than the exposure time value. That seems to have changed. The take a picture every time value now appears to operate as a delay between the end of the previous photo and beginning of the next shot. I am using ML is astrophotography so the exposure times are long, bulb values of 1 to 2 minutes. Is there a configuration variable that controls the operation of the 'take a picture every time' setting?