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Christmas Gift Guide

New tech

Power-zoom adapter

Connecting

Connecting

Size

Batteries

The updated version of the EF-S 18-135mm f3.5-5.6 IS lens incorporates two important features. First, it incorporates the new Nano USM (ultrasonic motor), intended to combine the still-focusing speed of the pro lenses with the quiet video operation of the current STM (stepper motor) lenses. Second, it's the first lens to have connectors for the new power-zoom adpater.

Caption by / Photo by Lori Grunin/CNET

The adapter provides a camcorder-like zoom switch that you operate with your left thumb. You can set zoom speed and disable it for manual zoom.

Caption by / Photo by Lori Grunin/CNET

These are the connectors where the power-zoom adapter fits to the lens. There are two notches on the sides where it locks in.

Caption by / Photo by Lori Grunin/CNET

This is where the adapter connects to the bottom of the lens.

Caption by / Photo by Lori Grunin/CNET

The power-zoom adapter is somewhat large, but it's a good size to pair with this lens.

Caption by / Photo by Lori Grunin/CNET

The adapter runs on four AA batteries.

Caption by / Photo by Lori Grunin/CNET
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