

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.

Via Egami