The Cinema AT-X 100mm T2.9 Macro Lens from Tokina is a true 35mm, full-frame, 1:1 macro close-up lens that fits Canon EF mount cameras. The lens achieves maximum magnification at a working distance of 11.8". This allows enough space for lighting, the camera operator, and the subject to work comfortably.The lens's optical design is 4K-ready, super sharp, high contrast, and exhibits very low distortion and chromatic aberrations. Focus breathing is very well controlled, and the lens has a de-clicked, 9-bladed, curved iris for beautiful bokeh and precise exposure control. The wide T-stop range, from T2.9 to T32, allows for maximum control of exposure and depth-of-field, which is critical when working very close to your subject.