title_left:  "Canon ST-E3-RT Speedlite Transmitter"@en " Canon Transmitter Radio-controlled two-way transmitter for multiple-flash setups at Crutchfield.com "@en
description_left: "Radio-controlled two-way transmitter for multiple-flash setups"@en 
title_right:  "Canon EF 17-40mm f/4L USM"@en " Canon USM L series wide-angle zoom lens for EOS SLR cameras at Crutchfield.com "@en
description_right: "L series wide-angle zoom lens for Canon EOS SLR cameras"@en 
specTableContent_right:  General Brand Compatibility Canon Image Stabilization No Focal Length 17-40mm Maximum Aperture f/4 Weight 16.8 ounces Parts Warranty 1 Year Labor Warranty 1 Year