Patent: Tamron 100-400mm f/4.5-6.3 VC
Tamron has filed a patent for a 100-400mm f/4.5-6.3 VC optical formula.…
Patent: Improved Detection of AF Errors
A patent showing an improved AF accuracy concept has appeared, and Northlight…
Patent: Canon 70-200mm f/2.8 DO
A patent showing another optical formula for a diffractive optics lens has…
Patent: Canon EF 11mm f/4 Optical Formula
A patent showing an optical formula for an EF 11mm f/4 has…
Patent: Canon EF 1000mm f/5.6 IS DO
Howabout a 1000mm replacement for the EF 800mm f/5.6L IS? A patent…
Patent: EF-M 9-17mm f/3.5-5 STM
Another EF-M optical formula patent has appeared, this time for a EF-M 9-17mm…
Patent: Canon EF 28-560mm f/2.8-5.6
A patent for a super zoom optical formula from Canon has appeared.…
Patent: Sigma 70-200mm f/2.8 DG OS HSM Sport
A patent showing the optical formula for a Sigma 70-200mm f/2.8 OS…
