28-70 & 50-135 Questions

[Adam Maas]

William Robb wrote:
> Hi,
> The Don gave me the two above mentioned lenses to test drive over the 
> weekend. I'm presuming these are USM lenses. Right now, they seem to be 
> using the body motor for focusing. Do I need to upgrade the firmware to 
> utilize the lens's focusing motor?
> Thanks
> 
> William Robb 
> 
> 

The 50-135 is SDM and will need the update. The 28-70 is a screwdriver lens.

-Adam