This is a so-called "normal lens" covering the full frame format. It was introduced in 2023 and is based on, and largely identical to, the smc Pentax-FA 50mm F1.4 lens from 1991. Which again can trace its roots via non-auto focus K-mount versions back to the screw mount Super Takumar 50mm F1.4 from then1960ies!
It was reissued in 2023 with HD coating and SP coating and a more modern exterior design. It offers an affordable option of a normal lens with a film era like image rendition as opposed to the crisp rendition of the designed-for-digital HD Pentax-D FA* 50mm F1.4.
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