How do I do dark frame subtraction for STAR2000 cameras?

Take your dark frames with the STAR2000 guider running, and with the image type set to Light, not Dark. Also, some tweaking may be necessary to get the best possible amplifier glow suppression. To do this, open the Pixel Math command (Process menu). Enter the light frame for Image A. Enter the dark frame for Image B. Select Subtract. Set Add Constant to 100. Set Image A Scale Factor to 100%. Zoom out and pan the image preview window until you can see the amp glow area. Now adjust the Image B Scale Factor to minimize the glow. Click OK.