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 The
            old ST4 auto guider is on its last legs, and I have built a new
            system which includes a homemade parallel port to ST4 interface
            adapter, the discontinued Meade DSI-C, and the software PhD guide.
            This program works better than any autoguiding program to date,
            I belive it is because of the type of calibration it performs
            - in bursts that automatically subtract out the backlash error.
            Seeing was poor, and 45mph gusts made the tracking on the M3
            shot interesting. But stars are round (a bit comatic however)
            and the system is robust.
Instrument:  12.5" f/5 Newtonian
Platform:  Astrophysics 1200 QMD
Camera:  Hutech Modified Canon XTi @ ISO400
Exposure:  9 x 1m = 9minutes total
Filters:  None
Location:  Payson, Arizona
Elevation:  5150 ft.
Sky:  Seeing  4/10, Transparency 2/10
Outside Temperature:  45F
Processing Tools:  Photoshop CS2, Maxim DSLR
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