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Updated Canon zoom gets a power boost (pictures)

The company's latest lens design supports an optional power-zoom adapter.

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Lori Grunin

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New tech

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.

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Power-zoom adapter

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.

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Connecting

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

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Connecting

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

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5 of 6 Lori Grunin/CNET

Size

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

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6 of 6 Lori Grunin/CNET

Batteries

The adapter runs on four AA batteries.

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