Ricoh files a patent for a 200mm f/2.8 full frame lens (for Pentax K-1)

9 years ago
Categories: Patents, Pentax lenses

Ricoh has a new patent application filed in Japan for a 200mm f/2.8 ED IF DC full frame lens (most likely designed for the Pentax K-1):

Patent publication No. 2016-51100
Published on April 11th, 2016
Filing date: September 1st, 2014
Focal length: 200
F-number: 2.8
Half angle of view: 6.3 °
Image height: 22
BF (back focus): 66.870
Overall length of the lens: 184.874

Sigma also recently filed a patent for a 200mm f/2 DG OS HSM lens.