which zoomgear for sigma 17-70 hsm for canon ?

[jan10]

I sea some old threads on this, but is there somebody that has suggestions for the best zoomgear for the sigma 17-70 hsm lens for canon in mdxhousing ?
thks
jan

 

[Amir Stern]

I have the sigma 17-70 the older model, i use the tokina 10-70 zoom gear..

 

[divertimmy]

I believe the new HSM version is different enough from the older model that the same zoom gear will not work. I can't confirm it, however. I have the HSM lens as well and have been looking into the RDX-600D housing, but don't know if I will need to just buy a different lens to have one that works UW or not.