JMI for me, I'm very happy with my existing 2" model, have had it since 2004 and given it a real caning.
Just bought the new 3" model, waiting for it to arrive :-)
The JMI models allow you to switch easily to manual focussing by loosening a spring-loaded knob. I've seen other manufacturers where you can't switch between manual and motorised without dismantling it.
cheers, Bird
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