Patent: Canon EF 14 f/2.8 with Flourite

This is a brief excerpt from CanonRumors

Patent for wide angle flourite conceptsCanon has filed patent for a wide angle flourite concept. Such a patent could be part of a new ultra-wide zoom lens, perhaps a 14-24 or a replacement to the 16-35. Egami also thinks it’s possible this patent could be for the EF-M mount. It’s an interesting read, even when Google translated. Read the full patent here.

Patent Publication No. 2013-37339

2013.2.21 Release Date

Filing date 2011.7.12

Example 1

Zoom ratio 1.00

Focal length f = 1.00mm

Fno. 2.90

Half angle of view ω = 56.66 °

Image height Y = 1.52mm

9.51mm length lens

BF 2.82mm

6 aspherical surfaces, the first surface 25

Punctually

Example 3

Zoom ratio 2.06

2.06mm – f = 1.00 focal length

Fno 2.79 -. 4.00

Half angle of view ω = 51.27 – 32.82 °

1.33mm – Y = 1.25 image height

8.55mm – 8.79 length lens

BF 2.41 – 3.46mm

Aspheric first surface, the fifth surface, the first surface 26

Positive and negative positive negative

Example 6

Zoom ratio 1.00

Focal length f = 1.00mm

Fno. 2.90

Half angle of view ω = 87.35 °

Image height Y = 21.60mm

9.51mm length lens

BF 2.82mm

6 aspherical surfaces, the first surface 25

Punctually

Source: [EG]

cr

Tags: EF 14-24 EF 16-35 f/2.8L II flourite patent

By: Canon Rumors

Continued… click here!

---

You just finished reading Patent: Canon EF 14 f/2.8 with Flourite! Consider leaving a comment!

via planet5D pinterest news http://pins.planet5d.com/patent-canon-ef-14-f2-8-with-flourite/