Ricoh filed a patent for a Pentax 35-80mm f/4 full frame lens

Pentax 35-80mm f:4 full frame lens patent
Ricoh filed a patent in a Japan for a 35-80mm f/4 full frame lens that is most likely designed for the Pentax K-1 DSLR camera. Here are the details:

  • Patent No: 2016-99586
  • Published on 2016.5.30
  • Filing date: 2014.11.26
  • Zoom ratio: 2.19
  • FNO: 4.1 – 4.1 – 4.1
  • Focal length: 36.11 – 51.17 – 79.07
  • Half angle of view: 31.9 – 22.9 – 15.0
  • Image height: 21.64 – 21.64 – 21.64
  • Back focus: 48.06 – 55.95 – 58.90
  • Overall length: 160.34 – 166.92 – 192.65

Ricoh recently also filed patents for a 100-300mm f/4 and 200mm f/2.8 full frame DSLR lenses.

Via Egami

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  • TheInconvenientRuth

    a 35-80/f4.0. I can barely contain my indifference.

    • BP2012

      This could be an ultra compact and very light lens, maybe colapsable. Probably a kit lens for next FF body which will be a digital equivalent of K-1000. Perfect match.

    • Zos Xavius

      would you care if it were a stack of primes. their older 35-80 design wasn’t bad at all.

      • TheInconvenientRuth

        I still use the lovely, tiny, wonderful SMC-A 24-50/4.0, loved it so much that I had it converted to F-mount (that cost more than what I paid for the lens..) It’s still my go-to travel lens if I go ‘light’. It performs amazingly well on a D800. I never liked the FA version Pentax made later. But a new 35-80/4.0 would have to be at least that small to be of any interest.

  • TinusVerdino

    More likely for 645z

    • Mistral75

      No: image height = 21.64mm ==> 24×36 image circle.

      • TinusVerdino

        21.64 is less than 24

        • Mistral75

          ‘Image height’ is the radius of the image circle, meaning its diameter is 43.28mm, whilst the diagonal of the 24×36 format is 43.27mm.

          • TinusVerdino

            Then they should call in radius or half height :p

  • Glorfindelrb

    My guess is that it was a challenger to the 28-105 as an initial “kit” lens for the K1 an did not qualified.

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