Balosurf Seems like a lot of bad camera pixels.
That amount of warm and hot pixels are on par with the current series of ZWO cameras (533, 2600, 6200). Just use a bad pixel map to get rid of most of them.
Most processing software will generate a master bad pixel map for you when it is creating a master dark frame.
Your FOV is simply field rotating causing the bad pixels to move relative to the cropped image.
It could also be caused by differential flexure of the guide camera relative to the main camera. If you are perfectly polar aligned, and autoguiding, you should look into differential flexure as the cause.
The field rotation is actually doing you a favor. If the polar alignment were perfect, those streaks would be stacked into very bright pixels if you don't remove them by using bad pixel maps.
By using dithering, those lines should also become more random and less noticeable.
If you want better cameras, other manufacturers sell cameras constructed from the industrial grade sensor chips (from the same series of chips that ZWO uses for the ASI533, ASI2600 and ASI6200). ZWO uses commercial grade sensors.
The reason they are easily identifiable as bad pixels is that on a one shot color camera, these things will show up as red, green or blue errors. You seldom have two bad pixels adjacent to one another, and therefore seldom see magenta, yellow or cyan defects (and even fewer white defects). Sensors with adjacent bad pixels should not have passed QA.
Chen
