If your piggybacking experiments are successful, you can get better pictures by stacking multiple images. These can be the same JPEG images you're already capturing, but jump into the procedures in Chapter 12 at the appropriate point and combine the images. If you're using an altazimuth mount, be sure to "rotate and stack" rather than just "stack" or "translate and stack" (translate means "move up, down, and/or sideways").
For even better results, switch your camera to raw mode and do the full procedure in Chapter 12. Be sure to take some dark frames right after your series of exposures; leave the camera settings the same but put the lens cap on and expose for the same length of time. If your camera is a Nikon, take both the images and the dark frames in Mode 3 (see p. 17); that is, turn on long-exposure noise reduction but turn off power to the camera after the shutter closes, while the automatic dark frame is being taken.
Cameras, lenses, and telescopes
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