The Canon EF 70-300mm f/4.5-5.6 DO IS USM Lens is an ultra-compact and very well built telephoto zoom lens with excellent image stabilization and fast, quiet AF. I was immediately impressed by the solid build quality of the Canon EF 70-300mm f/4.5-5.6 DO IS USM Lens.

Canon EF 70-300mm f/4.5-5.6 DO IS USM Lens Review. As a long-term user of a Canon 75-300 IS USM lens I hoped that Canon would bring out an L-series version of this lens with better optical quality, especially at the 300mm end. When Canon introduced the 100-400 IS lens I bought one to get higher quality images of wildlife at long focal lengths but although the results were good, I found the lens very heavy to use and only carried it on specific projects. Most times I just carried the 75-300 IS as it fitted into my small bag , was much lighter to hand-hold, and on my Canon 10D was equivalent to 120-480mm.

Canon EF 70-300mm f/4.5-5.6 USM DO IS - Review / Lab Test Report Lens Reviews - Canon EOS (APS-C). The Canon EF 70-300mm f/4.5-5.6 USM DO IS is a very special lens - not so much regarding its naked specifications but because of its DO design.

The Canon 70-300mm DO IS is the world's first consumer zoom to use Fresnel lenses. Canon uses a green band around the front to denote a DO lens. Canon call this technology "Diffractive Optics" (DO) to avoid riling up unnecessary fear in laypeople familiar with Fresnel lenses' former use only in lighthouses, theatrical lighting and projector condensers.