Here are two 15-second master darks, created at the Lowest Read Noise setting (Gain 300 Brightness 140). The only difference is the sensor temperature recorded by SharpCap when the master dark was created.
15.2C master dark: 30.6C master dark: Does the anti-amp glow circuitry perform worse when the sensor is colder? If not, what could be happening to cause the "amp" glow to be worse at colder temperatures? Thanks
M74 Gain 300 Horsehead Gain 300
Got your problem.
But I have to say, at low temperature, the amp glow is not worse, on the contrary, it is better. But more obvious than high temperature。At high temperature, it is just not obvious.
Usually, we think the amp glow is caused by the heat of circuit and dark current. At a high temperature, dark current and heat also will be big for all of the pixels, as a result, the amp glow will be covered by them. But in low temperature, those pixels that are not affected by glow will perform better, but for other pixels, even their dark current also reduced, but the improvement was not great, which increased the gap between them. This in turn causes the amp glow to become more obvious.
Like a fire, you will feel warmer in winter than in summer. But in fact, the same fire loses heat faster in the winter, so it just widens the gap so that you can feel it more clearly.
Please take care of the temperature.
Usually, you should make sure all of the fields are at the same temperature. For cool camera, it is easy. but for uncool camera, it is not a easy job.