Canon EF 70-300mm F4.5-5.6 DO Diffractive Optics IS USM Lens EOS DSLR Boxed
Diffractive Optical (DO) optics. Canon EF 70-300mm IS USM DO F4.5-5.6 Zoom Lens for EOS DSLR's - Boxed. The EF 70-300mm f/4.5-5.6 DO IS USM features a three stop Image Stabilizer (IS), making this an ideal lens for handheld work.