Looking for cheap digital setting circles?

GoTo 'scopes may be all the rage, but digital setting circles (or DSOs) have been around for far longer. These normally take the form of optical encoders attached to both axes of your 'scope mount read by a hand controller or interface connected via a serial cable to your computer. Thanks to a really useful little digital angle gauge that easily attaches to your 'scope, you can read how I used it in conjunction with a PDA running planetarium software to help me in my searches. Just click here to read the story.