Shadow throwing on QHY16200A CCD sensor

Shadow throwing on QHY16200A CCD sensor
« on: March 10, 2021, 11:16:16 PM »
As you can see in the attachment, this camera's window is casting a shadow on the CCD surface. I already know that if I take a flat frame and process it, it will disappear. I am planning to increase the window size to fix this problem. Is there anybody who can give me some advice?


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Re: Shadow throwing on QHY16200A CCD sensor
« Reply #1 on: March 15, 2021, 08:55:41 PM »
This is because the center is bright and the edges are dark due to the lens or telescope effect. It is not that the front end of the camera is too small, so modifying the front port diameter of the camera will not solve it. If you encounter hardware occlusion and calibrate the flat field, it will not be solved. At this time, you need to modify the hardware occlusion.