Is Panasonic 12-35mm II parfocal?

hindesite wrote:  I personally think you asked the wrong question - because nobody cares if the lens is parfocal these days; it is almost certainly electronically adjusted so the effect for the end user is the same.

I disagree, if you ever shoot SPORTS, that total 3 ~ 6 seconds lost due to camera re-focusing after changing zoom range is DEADLY.  Its the difference between "getting the shot" versus losing all the shots.

A true parfocal zoom can

• Retain AF (no need to refocus) while changing Zoom from 70mm to 200mm back to 70mm. 
• Parfocal zoom makes them excellent of TRACKING, fellow focus, and mostly for shooting sports when you need to Zoom Out to wider 70mm then zoom into tigher 200mm head shots

Versus cheaper Non-Par-Focal

• cannot retain AF when you change your zoom range
• every change in zoom ring will require another Focus Readjustment
• more you Zoom In/Out, more Lost Time in Refocusing is required and is costly in sports shoooting.

AFAIK, Panasonic 12-32 II isn't parfocal, so changing from 12mm to 32mm will induce a camera to refocus.  One solution is to buy the Sigma 18-35/1.8 HSM (canon version) and used a $600 Magic Lantern adapter.

Having said that, In Real Life, I find PARFOCAL rather meaningless in the WIDE-to-Normal zoom because camera can focus so fast that losing refousing and refocusing isn't as costly as it is in Telephoto Zoom with heavy lens elements.