In case anybody is interested, this is a demo video I put together for a talk I gave last week to the imaging group of the New South Wales Astronomical Society on Optec's FocusLock which I used entirely for my image of NGC 1532. It's a bit long mostly because I was taking long guide exposures. If short guide exposures are used it is considerably faster. In reality it is of no consequence as camera focus changes are quite slow. It only matters for the purpose of demonstrating. The exciting thing is that this focus system is coming to the Lodestar guide camera + OAG, so no ONAG required. This will be released in April at NEAF.
https://www.youtube.com/watch?v=UtgBTVEImZg
Peter
I took this image (ca 26 hours) entirely with FocusLock:
http://www.astrobin.com/full/240667/0/
The background music is performed by my partner, Bernadette Harvey, playing Ross Edwards "Mantras And Night Flowers."