Category Archives: Patents

New patent application for Pentax 70-150mm, 100-170mm, 70-180mm, and 150-250mm lenses

By admin | Published: June 2, 2025

Ricoh has a new patent application released on May 30, which includes several optical lens designs/calculations: 70-150mm f/4.6-5.7 100-170mm f/4.6-5.2 70-180mm f/4.1-6.1 150-250mm f/5.3-7.9 Additional informtion:

Also posted in Pentax lenses | 1 Comment

Ricoh has a new patent for an 18.3mm f/2.8 lens, most likely designed for the rumored GR IV camera

By admin | Published: May 2, 2025

Ricoh has filed a new patent application for an 18.3mm f/2.8 lens, most likely designed for the rumored Ricoh GR IV camera. The patent application JP2025-069515A was filed on 18 October 2023 and was just published online:

Also posted in Ricoh GR | Tagged | 1 Comment

Ricoh has a new patent for a Pentax 14mm f/3.5 APS-C lens for K-mount

By admin | Published: May 17, 2024

Ricoh has a new patent (JP2024-067293A) for a 14mm f/3.5 APS-C lens for K-mount (21mm equivalent). The inventor is Takahiro Nakayama, the same person who designed the optics of the HD Pentax-DA★ 16-50mm f/2.8 ED PLM AW lens. Additional information from the patent filing:

Also posted in Pentax lenses | 2 Comments

Another Pentax 70-300mm f/4.5-5.6 lens patent field in Japan

By admin | Published: November 10, 2022

Rumors for a new HD Pentax-D FA 70-300mm f/4.5-5.6 ED PLM WR SR lens have been going on for a while – see also the latest Pentax lens roadmap that indicates a similar zoom lens: A corresponding 70-300mm lens was already filed by Ricoh back in 2020. Another 70-300mm f/4.5-5.6 lens patent was just listed […]

Also posted in Pentax lenses | Tagged , | 5 Comments

Ricoh has filed a patent for a 24-90mm f/4 full-frame DSLR lens

By admin | Published: September 10, 2022

Ricoh has filed a patent for a 24-90mm f/4 full-frame DSLR lens. Pentax already had a 24-90mm f/3.5-4.5 SMC FA IF AL lens for K-mount: Here are the details from the patent application:

Also posted in Pentax lenses | 1 Comment

New: Ricoh patent application for 21mm f/2.4, 18mm f/2.4, 16mm f/2.4, and 14mm f/2.4 full-frame lenses

By admin | Published: August 12, 2022

Ricoh has a new patent application for multiple full-frame lenses including 21mm f/2.4, 18mm f/2.4, 16mm f/2.4, and 14mm f/2.4:

Also posted in Pentax lenses | 3 Comments

Ricoh filed a patent for a 18-100mm f/2.8 APS-C lens

By admin | Published: December 27, 2021

Ricoh has filed a patent for a 18-100mm f/2.8 APS-C lens (28-150mm equivalent) – here are the details:

Posted in Patents | Tagged | 2 Comments