Photoclubalpha

Sorry about my confusion Philip, yes that makes perfect sense to me now! lol
I assume older Sigma lenses (before APS-C) should be ok, unless the A900 point blank refuses to recognise the old Sigma chips that is!

To Kevin: Thanks for the welcome

Regards.
Den.

Thank you for the welcome

I've lurked for a while, but have been meaning to register.
It's a good forum, well worth supporting, so if anyone else is doing what I was, maybe it's time to join

Regards.
Den.

Hi Philip

Isn't your Sigma 12-24mm a full frame lens?
Why would it activate APS-C crop on the A900?

Regards.
Den.