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Product Description
Manufacturer's Description
Canon initiated the EF lens line in March 1987 as part of the innovative EOS system with the underlying development concept of fusing automatic and manual operation. Heralding a new era in SLR photography, the EF lenses with built-in focusing motors were the first to communicate completely electronically with the camera body. Followed by the high optical performance L-series, incorporating the silent Ultrasonic Motor (USM) and at a later stage the world's first interchangeable SLR lens with an image stabilizer, the EF lens series today is the largest line-up in the autofocus SLR world.This telephoto macro lens is capable of focusing to life-size (1X) without attachments. Although it replaces the EF 100mm f/2.8 MACRO lens marketed in 1991, it is a completely new design. It incorporates a ring type USM giving quiet, high-speed autofocus. The full-time mechanical manual focus gives very smooth manual focusing. For the first time in a 1X focusing telephoto macro lens, inner focusing is used. The lens length remains constant and a long working distance of 149mm makes worrying about getting too close to the subject unnecessary. Also, during focusing the front ring does not rotate making use of front-mounting accessories like macro ring lites simple and effective. "Three-group floating" focusing construction uses three independently moving groups, which holds focusing-related changes of aberrations to a minimum giving excellent image quality all the way from infinity to life size.
Product Description
Technical DataDimensions & Weight / Weightg600Technical DataDimensions & Weight / Lengthcm11.9Technical DataHeader / Product LineCanonTechnical DataHeader / LocalizationEnglishTechnical DataHeader / ManufacturerCanonTechnical DataHeader / Packaged Quantity1Technical DataLens System / TypeMacro lensTechnical DataLens System / Special FunctionsMacroTechnical DataLens System / Lens ApertureF/2.8Technical DataLens System / Min Focal Lengthmm100Technical DataLens System / Min Focus Rangecm31Technical DataLens System / Focus AdjustmentManualTechnical DataLens System / Max View Angledegree(s)24Technical DataLens System Mounting / Mounting TypeCanon EFTechnical DataOptical System / Magnification1 / 1Technical DataDimensions & Weight / Diametercm7.9Technical DataLens System / System TypeLens