Canon Patent: 135mm f/2 1:2 Macro And 200mm f/2.4 1:2 Macro Lenses

And yet another Canon patent application: 135mm f/2 1:2 Macro And 200mm f/2.4 1:2 Macro Lenses.

Canon patent application 2022-22595 (Japan) discusses optical formulas for two macro lenses: 135mm f/2 1:2 M.

PROBLEM TO BE SOLVED: To provide an optical system capable of expanding a close range in a small size while suppressing the number of focus groups, and an image pickup apparatus having the same.

If the floating focusing method is used to increase the close-up magnification, the number of lenses in each group increases, and it is difficult to drive the focus group at high speed. In the lenses of Patent Document 1 and Patent Document 2, when the number of lenses in the focus group is reduced in order to realize high-speed drive, sufficient aberration performance cannot be obtained because the configuration of each group is not appropriate.

An object of the present invention is to provide an optical system capable of expanding a close range in a small size while suppressing the number of focus groups, and an image pickup apparatus having the same.

Example 1

• Focal length: 133.0
• F value: 2.05
• Half angle of view: 9.24
• Image height: 21.64
• Shooting magnification: -0.5

Example 3

• Focal length: 200.0
• F value: 2.40
• Half angle of view: 6.18
• Image height: 21.64
• Shooting magnification: -0.5

Example 4

• Focal length: 199.9
• F value: 2.80
• Half angle of view: 6.18
• Image height: 21.64
• Shooting magnification: -1.00

The Canon patent application was spotted by asobinet.com. More Canon patent applications are listed here. Some particularly interesting patent applications we think might get into production are these:

• Automatic shutter silencing based on subject and distance
• A bunch of prime lenses for the RF mount
• An improved Electronic Viewfinder
• Patent application for RF 50mm F1.4 and an RF 35mm f/1.4 lenses
• A zoom lens that might be for an EOS R with APS-C sensor
• A smaller IBIS unit.
• A cooling adapter for the RF mount (R5 overheating?)
• A bunch of macro lenses for the RF mount.
• A 8mm f/4 circular fisheye lens for the Canon EOS R system
• A battery grip that works with differently siszed cameras
• A 100-400mm f/5.5-7.1 lens for APS-C cameras. EOS M or DSLR?
• RF 17-70mm lens for EOS R system
• IBIS coming to the EOS M and PowerShot lineup?
• Patent Application: mirrorless camera with large display and virtual control wheel
• Patent Application: IBIS and Lens IS Working Together
• Patent application for high speed mirror movement and control
• Patent application for an RF 14-28mm f/2 lens
• Patent application for an RF 50mm f/1.8 lens
• Patent application for a smart lens cap
• Patent application for celestial auto-focus
• Patent application describing a Pop-Up Flash With LED
• Patent application describing the optical formula for a RF 70-300mm F/4-5.6 IS lens for EOS R systems
• Patent application describing how to improve burst rate by compressing raw files
• Patent application describing a new way to review photos from a sequential shot
• Patent application that describes technology to improve wireless communication while reducing power consumption
• Patent application to spot and reduce moire artefacts in image data
• Patent application for weather sealed lens adapter
• Patent application for AI powered predictive camera control system
• Patent application for 18-55mm kit lens with LCD display
• Patent application to reduce noise in image files