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You are right, my software (AstroVideo) works same as yours. Image I have posted was taken with 25 frames 600x, fixed. Meaning that every frame is superimposed on previous one But frame integration is also done by camera itself. I can set camera for no integration 0.1 LUX sensitivity to 128x(about 2.5sec) 0.001 LUX. Advantage is increase in sensitivity, ( you can see up to 3 mag more for given lens size) disavantage is that it works well only for stationery or very slow moving objects, like stars) . Anything that moves fast ( meteors, aircraft or satelites leaves faint broken trail. It is because pixels on CCD don't receive full charge as image moves from one pixel to other one, because interation have not finised. When I use this camera with 6" telescope I can see stars that I would see with 12" scope. But as I said, it got advatage and disadvantages. If I move scope I have to wait for 2 sec until image settles down.
Karl
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