rtphokie
Photo board moderator
- Joined
- Jan 9, 2006
- Messages
- 3,607

From the review:
The dedicated Li-ion battery BP-21 is used to power the zooming and AF operation. This battery is built in the lens barrel. For the convenience of the photographer, focusing distances and focal lengths can be viewed on the lens`s built-in LCD panel.
Review
I thought it was a hoax until I found it on the Sigma website
My digital rebel would look like a speck of dirt in need of being flicked off this lens.