Hi andyhewitt3
Check out this link:
https://www.pentaxforums.com/forums/pentax-camera-accessories/24088-af360-fgz...tml#post208969 Quote: Just sent my second AF360-FGZ back to Pentax for non function of zoom. This one lasted six months, used only a handful of times. The first one I got came broken so had it exchanged at the shop, this time I have to wait 5 weeks.....Before buying the flash I read reports of flimsy battery door that keeps coming open, which mine does. For £200 I expect higher quality than this. Sorry about the rant..had to tell someone.
And concerning the AF360-FGZ's bigger brother:
a) Well, AF540FGZ has its own problems, like zoom or getting stuck.
b) The AF540FGZ is nowhere near the quality it should be. I was expecting you to say that your flash's zoom had jammed at 16mm as so many have complained about in the past.
c) I have one AF540FGZ that has had zero issues, and the other has had an intermittent jamming of the zoom mechanism and a complete P-TTL failure.
And additionally regarding some Sigma models:
Sigma EF500 - Zoom Problems:
Quote: The whole zoom assembly jamming for whatever reason after a few dozen shots. I put this down the materials used in its manufacture expanding with the heat. It causes an unpleasant grinding noise.
Sorry to be the bearer of bad news, but it appears that your problem is not totally unique !
Best regards
Richard