Let me tell you about clickPAN-SDM, a very successful collaboration with David Sykes (SDM) and Dave Mitchell (Scripting).
The script sends commands to the servos via the AF assist lamp (which you don't need when shooting outside). clickPAN-SDM has a sensor which is velcroed over the camera AF assist lamp to receive the script instructions, as well as a battery input and 2 servo outputs. The unit can interface to standard servos (can move them up to 180degrees if the servo can support it) as well as servos modified for continuous rotation.
There is complete flexibility, so if you want to design a rig that uses 2 standard servos and only "scans" 90degrees of the sky then there is no reason why not. The power is in the scripting!
This is a lot to get your head round! There is more information here:
At the moment the documentation is aimed at users who are already familiar with installing SDM and running scripts. The material doesn't cater as well for those who are new to SDM or who want to use this device for other applications or take it further.
Earlier I mentioned you could have a RC and autoKAP rig, the commands are all there and tested but no-one has built the rig yet! Its only once people start using clickPAN-SDM that their ideas will show its full potential!
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