 "Canon EF 2x III Extender"@en " Canon Extender Multiplies select telephoto lens's focal-length by 2X at Crutchfield.com "@en
"Multiplies select telephoto lens's focal-length by 2X"@en 
 "Canon EF telephoto zoom lens - 70 mm 300 mm" " Canon 4426B002 Camera & Camcorder Lenses CDW.com
"Designed to deliver ultra-high quality images along with lightning fast operation, the Canon EF 70-300 f/4-5.6L IS USM telephoto zoom lens brings a favorite zoom range to the celebrated Canon L-series of lenses. It features two Ultra Low Dispersion (UD) elements for improved image quality and reduced chromatic aberration, incorporates a floating focusing mechanism for sharpness from close up to infinity, plus an IS system that increases usability by approximately four stops. The EF 70-300 f/4-5.6L IS USM features a function that prevents erroneous operation when the lens is mounted on a tripod or monopod. Gleaming white, with a removable tripod collar, dust and water resistant construction, and a newly developed Fluorine coating that keeps soiling, smears and fingerprints to a minimum, its phenomenal performance and flexibility is assured. For portraiture or to bring what's far away up close, this addition to the L-series is guaranteed to perform." 