I just picked up an FS5M2 and bought 2 lenses:
SEL55210 E 55-210mm F4-F6.3 OSS
SEL1855 E 18-55mm F3.5-5.6 OSS
Everything works fine and Sony's compatibility site says the lenses are 'fully compatible'.
https://support.d-imaging.sony.co.jp/www/cscs/lens_body/index.php?mdl=PXW-FS5&area=eu&lang=en

but no mechanical zoom, just the clear zoom.
focus-check, steady cam -check, iris-check...all good but...

Is the kit lens the only one that uses the mechanical zoom or is something amiss here?

Aloha,
Wayne Z

Hi Wayne, the lenses you own are indeed manual zoom only. Very few lenses actually have the internal zoom motors necessary for the grip rocker to work optically - the 18-105mm being one of them. Quick trick to knowing which ones work is the lens having a little zoom switch on the side. Some others that come to mind with the internal zoom motors are the compact 16-50mm and the expensive 18-110mm cine zoom. Hope that helps.

Thank you for that information.
Now,at least I know everything is working as it should.
Great little camera.
Aloha,
Wayne

In addition to the 18-105, there is also the Sony 18-110 parfocal zoom lens, which works just fine with the FS5. It works with either the rocker zoom control, its own zoom control or manually.

Thanks Jeremy.