Sigma 21-35mm F/3.5-4 Manual Focus Lens For Pentax K Mount {67}

The Sigma Super Wide 21-35mm F/3.5-4 Macro Zoom Before Sigma introduced this truly ultra-wide angle zoom, the widest range for wide angle zoom lenses was 24mm. The Sigma 21-35 was the world's first, and only, super wide angle zoom lens. It. Covers all four of the most important focal lengths - 21mm, 24mm, 28mm and 35mm - in one lens. And with the 21mm to 24mm focal lengths, you can create exciting changes in perspective that were not possible before. Incorporating Sigma's unique floating element system, all types of aberrations are virtually eliminated throughout the entire zoom range. Angle of view: 92 to 63 degrees Optical construction: 11 elements in 7 groups Diaphragm operation: Automatic Minimum focusing: 50cm Weight: 465 grams