|Manufacturer:||Asahi Pentax, Japan|
|Type:||Ultra Achromatic Takumar|
|Description:||The Ultra-Achromatic-Takumar 300 mm f/5.6 consists of both Quartz and Glass lenses and was designed for use with ultraviolet, visible and infrared light. Lens design: 5 elements in 5 groups. The fully achromatic correction results in no focus shift between UV, VIS and IR, thus allowing visual focus without correction. Achromatic correction range: 320..850nm. Filter mount M58.
[Brochure, drawings, graph (C) Asahi Pentax Corporation; lens drawings courtesy M. Cavina]