Jay,

Looks like James is using it on a Sony A1U. I'm not sure the "snap focus" responds the same on the A1. I'll try and test it out in the next few days and let you know.

Zoe in transit...
 

Awaiting UPS for a DVXL... even with the A1 locked down and sandbagged on a 'real' tripod, just looking at the zoom controls causes frame movement. It's obvious that decent HD field work requires more than a casual investment in accessory items but the results are priceless.