�Rear Gelatin filter holder �Lens focusing ring does not move during autofocus, making for easy handholding �Four Special Low Dispersion (SLD) glass elements are provided for effective compensation of color aberration, which is a common problem with super-wide angle lenses �Two pieces of Glass Mold and one-piece hybrid aspherical lenses offer excellent correction for distortion as well as all types of aberration �Minimum focusing distance of 11" (28 cm) at all focal lengths �As part of the DG line, this lens is optimized for digital cameras
Filter Size: Rear gelatin filter slot f/Stop Range: 4.5-22 Minimum Focus Distance: 11" (28 cm) Magnification: 1:7.1 Zoom/Focus Control: Two-touch Angle of View: 122 to 84.1 Degrees Groups/Elements: 12/16 Length: 3.9" (100mm) Maximum Diameter: 3.4" (87mm) Weight: 1.35 lb (615 g)
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