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The smc PENTAX-DA* 1:4 300mm ED [IF] SDM is a supertele prime lens for Pentax K-mount. It uses Pentax' silent SDM motor for autofocus on compatible cameras ( K10D [ 1 ] and K200D upwards), and has Quick Shift Focus to allow manual adjustments in autofocus mode.
The SMC Pentax-DA 18-55mm f/3.5-5.6 AL lens is a standard zoom lens for the Pentax K-mount. It is often sold as a kit lens with Pentax digital SLR cameras and has a 35mm equivalent focal length of 27–82.5mm. Its optical formula is made of 12 elements in 9 groups. There are two variants of this lens:
The largest lens produced by Pentax was the Reflex 2000mm, with non-mirrored lenses available up to the A* 1200mm. As with most manufacturers, telephotos of this range are no longer in production. Pentax provided premium focal lengths well beyond 1200mm, such as their 3800mm through the Pentax telescope division.
Five lenses have been released for the Pentax Q. A sixth lens and an adapter were announced in September, 2012. Pentax 01 Standard Prime (2011) — 47 mm equivalent; Pentax 02 Standard Zoom (2011) — 28–80 mm equivalent; Pentax 03 Fisheye (2011) — 17.5 mm equivalent; Pentax 04 Toy Lens Wide (2011) — 35 mm equivalent; Pentax 05 Toy Lens ...
Pentax originally used the M42 lens mount. In 1976 they created the K-mount, which they have used since for 35mm and latterly APS-C format camera systems.
The Nikon F-mount lens systems and the Pentax K-mount systems are the only 35 mm SLR camera systems (apart from the Leica M-mount rangefinder system) that allow a photographer to use a mechanical SLR camera body, a fully automatic SLR camera body, and a DSLR camera body, all utilizing the same lenses.