Focus drive Direct current Focal length (35mm equiv.) 840mm | Focal length 560mm Aperture (max/min) f/5.6 / f/45 | |
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As of July 2015, the Pentax HD DA 560mm F5.6 ED AW is the longest prime lens in production under the Pentax brand. It has a telescope-type optical design.
References
Pentax DA 560mm lens Wikipedia(Text) CC BY-SA