Canon EF 100mm 2.8 Macro USM, 8/12, 100 mm Canon EF 100mm 2.8 Macro USM. Lens structure (elements/groups): 8/12, Lens viewing angle, diagonal: 24°, Focal length range: 100 mm. Product colour: Black. Filter size: 58 mm, Weight: 600 g. Magnification: 0.14x http://www.itreviews.com/canon-ef-100mm-f2-8-macro-usm/ The Canon EF 100mm f/2.8 Macro USM ($599.99 direct) is a telephoto lens for Canon cameras that can focus close enough to capture objects with true 1:1 magnfiication. It is adequately sharp, even at its maximum aperture, but does suffer from some optical i... The Canon EF 100mm f/2.8 Macro USM may not be the company's top of the line macro lens, but it does capture sharp images with 1:1 magnification.... https://www.techradar.com/reviews/cameras-and-camcorders/cameras/camera-lenses/canon-ef-100mm-f-2-8-usm-macro-287428/review The Canon EF 100mm f/2.8 USM Macro is one of two new 100mm macro lenses in Canon's range, the other being the more expensive L-series optic, the CanonEF 100mm f/2.8L Macro IS USM, which has the advantage of a new Hybrid IS system. This one may lack ima... Control over distortion is good, Quick and quiet autofocus, Generally great image quality, Affordable, Manual focusing is easy No image stabilisation system, Old-fashioned design, Focusing ring's position could make it hard to adjust, Some holes in image quality Overall then, this lens is a capable performer, with quick and silent autofocus system and generally good to excellent image quality. While more expensive then the Tamron SP AF 90mm F/2.8 Di Macro 1:1, it has the distinct advantages of an internal foc... http://www.photoanswers.co.uk/Gear/Search-Results/Lenses/Canon-EF-100mm-f28-Macro-USM-/ The Canon EF 100mm f/2.8 Macro USM lens is a quality piece of kit, offering excellent results and solid build-quality.... http://www.photoanswers.co.uk/Gear/Search-Results/Lenses/CANON-100mm-macro/ The Canon EF 100mm f/2.8 Macro USM lens is a quality piece of kit, offering excellent results and solid build-quality. ...