This standard zoom lens smoothly transitions from wide angle to short telephoto focal lengths equivalent to 35.5mm to 67mm in a 35mm format. Through the zoom range, it maintains a constant f/4.5 maximum aperture and can stop at f/32. Sliding the focus ring forward or backwards quickly lets a photographer change from auto to manual focus, down to a minimum distance of 1.6 feet away. As well, an eight-blade diaphragm creates even out-of-focus areas in images.
Key Features
- 35mm focal length equivalent of 35.5–67mm
- Aperture range of f/4.5 to f/32
- Angle of view of 76° to 44.5°, which equates to 61.5° to 36° on Pentax 645 digital cameras
- Lens construction of 11 elements in 9 groups
- Accepts 77mm threaded filters
- Minimum focusing distance throughout the zoom range is 1.6'
- Works with both film and digital formats
- Aperture ring and focusing distance scale
- Eight diaphragm blades for smooth out-of-focus areas