Ricoh files a patent for a Pentax 100-300mm f/4 full frame lens

Pentax 100-300mm f:4 full frame lens patent
Ricoh recently filed a patent in a Japan for a 100-300mm f/4 full frame lens that is most likely designed for the Pentax K-1 DSLR camera. Here are the details:

  • Patent No. 2016-80717
  • Published on May 16th, 2016
  • Filing date: October 9th, 2014
  • Zoom ratio: 2.87
  • FNO (aperture): 4.1 – 4.1 – 4.1
  • f (focal length): 102.00 – 200.01 – 293.01
  • L (length): 279.45 – 279.44 – 279.44

Ricoh also had a recent patent for a 200mm f/2.8 full frame lens.

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