Wide-angle zoom. When attached to the PENTAX interchangeable-lens digital SLR camera "PENTAX *ist D Series", it provides an angle of view equivalent to a focal length of 18.5mm to 37mm in 35mm format. It has a 2x zoom ratio covering ultra-wide angles, allowing for expressions unique to wide-angle lenses such as emphasizing perspective and deep depth of field. Digital-only design. Optimized for the sensor size (23.5mm x 15.7mm) of the "*ist D Series" image circle, the optical system is specifically designed for digital imaging characteristics. Compared to interchangeable lenses for 35mm format SLR cameras with similar specifications, it achieves higher cost performance and a more compact, lightweight design, while delivering high-quality images. High optical performance. Employs Special Low Dispersion (ED) glass and two aspherical lenses, achieving both high descriptive performance and compactness. Other features: - Features the unique "Quick-Shift Focus System" which allows manual focusing after autofocusing without switching modes. - Achieves a minimum focusing distance of 0.3m across the entire zoom range. - Features a metal lens mount.
- Angle of View [degrees] 99~61
- Construction [groups*elements] 11*13
- Minimum Aperture [F] 22
- Minimum Focusing Distance [m] 0.3 (all ranges)
- Filter Diameter [mm] 77
- Maximum Diameter x Length [mm] 84x87.5
- Weight [g] 430
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