Tip 1: Use a refractor for autoguiding scope, not a sct. You can get image shift from the primary mirror on a sct, and that will wreck an exposure randomly.
Tip 2: Forget the neximage. Not sensitive, not long exposure and you need a gpusb. Its a planetary camera.
Tip 3: Get the qhy5/starshootag (they are practically the same), Why? The ssag has a st4 output (rj12 cable) that plugs DIRECTLY into your mount with only a usb to your computer (ie the autoguiding input does not go through your computer). They are very sensitive being mono and a much larger chip to pick guidestars from.
My .02c
