Canon Mirrorless Fun
A patent showing an 18-45 f/3.5-5.6 kit lens for an APS-C sensored mirrorless camera has appeared. That would be a 29mm-70mm lens when crop is factored in.
Source: [EG]
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Lenses
I’ve heard that Canon will be introducing a lot of new lenses this year. Quite possibly a record amount of new lenses announced in a single calendar year. For the moment, it’s unknown whether the lens count will include any mirrorless camera lenses, or if we’re talking EF lenses.
I will say, Canon may be updating lenses to help resolve a coming huge megapixel camera. We’ve heard previously a lot of short focal length lenses are on the update schedule, and we just saw 2 primes and a zoom announced.
Keep watching patents for clues. The EF 24 f/2.8 seemed like an odd duck, yet here it is. I almost expect an EF 50 f/1.2L II, no IS on that one though.
Camera Bodies
Lots of speculation about the end of the month for a new camera body. However, there is nothing concrete and I’ve been told that things are going “back and forth” in regards to an announcement.
I will say I have heard there will be a very high megapixel camera some time in 2012, possibly in the 40mp range and it won’t be the “5D Mark III”.
The next announcement should be for an EOS body or two.
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New Lens Formula Patents
A new 400 f/4L IS non-DO would probably be a very welcomed lens. However, it will probably depend on the price of the 200-400 f/4L IS 1.4x ($8000+ I predict) as to whether or not it ever sees the light of day. The 200 f/5.6 is a strange one.
Patent Publication No. 2012-22105
- 2012.2.2 Release Date
- 2010.7.14 filing date
Example 1
- 392.00mm focal length
- Fno 4.12
- 3.15deg half angle of view.
- Image height 21.64mm
- Length 279.32mm lens
- BF 64.82mm
- 15 sheets of 12 group configuration
- An aspherical surface
- Inner focus
- Telephoto ratio 0.71
Example 3
- 200.00mm focal length
- Fno 5.77
- 6.18deg half angle of view.
- Image height 21.64mm
- Length 180.00mm lens
- BF 54.98mm
- 6 lenses in 5 groups configuration
- Telephoto ratio 0.90
Example 4
- 294.00mm focal length
- Fno 4.14
- 4.21deg half angle of view.
- Image height 21.64mm
- Length 239.85mm lens
- 14 images in 9 groups configuration
- An aspherical surface
- Inner Focus
- Telephoto ratio 0.815
- Telephoto lens
- Stretch the focal length, and miniaturized, on-axis chromatic aberration and lateral chromatic aberration occurs
- Tele photo lens type refers to the overall length is shorter than the focal length
- And telephoto ratio refers to the value obtained by dividing the focal length the total length
- Canon’s patent
- Using the lens refractive index distribution
Source: [EG]
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Canon has filed a patent for RAW video
“The recording of successive frames of raw sensor data depicting a moving scene is provided. The raw sensor data comprises pixel data for an image sensor having pixels arranged in correspondence to a mosaic of plural different colors in a color filter array.”
EOSHD broke it down for people that like english.
- Designed for compatibility with CF cards
- Supports 4K and 2K video (4K is 4096×2048)
- Works with Bayer CMOS sensor (like the one in a DSLR)
- Sensor output is 12bit
Although current C300 camera has a 4K sensor, it cannot output a 4K image because most of the pixels are used to reconstruct colour without interpolation (made up pixels in-between).
Source: [P5D] via @Loricnet
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New Sensor Patent
Canon has published a back illuminated sensor patent for APS-C and Full Frame sensors. Back Illuminated Sensors allow for a more effective use of pixel area.
Patent Publication No. 2012-15275
- 2012.1.19 Release Date
- Filing date 2010.6.30
Back-illuminated imaging device
- The two bonded substrates photoelectric conversion unit and the peripheral circuit manufacturing to
- Photoelectric conversion unit and the peripheral circuit microprocessor which is connected by bump
- The incident light is changed and the current strong influence to adjacent pixels in the peripheral circuit, and noise (similar to a smear phenomenon).
Canon’s patented
- And a peripheral circuit connected to a DC power supply photoelectric conversion unit
- Resistance is lowered, reducing the voltage drop
Source: [NL] via [EG]
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Canon EF/EF-S 55-110 f/2
A new patent showing off a unique zoon range and speed from Canon. Would indoor sports be the target market with such a lens?
It’s noted that this may be for APS-C cameras, therefore an EF-S lens. (thanks Michael)
Patent Publication No. 2012-8344
- 2012.1.12 Release Date
- Filing date 2010.6.24
Example 1
- Focal length f = 55.5 – 112.2mm
- Fno. = 2.0
- 2.0 zoom ratio
- Half angle of 13.4181 – 6.712 deg.
- Each group 18 Configuration 15
- Inner Zoom
- Group of the formula before feeding
- Negative distortion that occurs in the front lens group and zooming to the telephoto side, causing a distortion in the positive side of the rear lens group is moved to the fifth group, the overall distortion suppressed .
Source: [EG]
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New Optical Formula Patents
A new patent showcasing 3 different focal lengths has come to light.
- Patent Publication No. 2012-8352
- 2012.1.12 Release Date
- Filing date 2010.6.25
- Example 1
- Focal length f = 294.0mm
- Fno = 4.14
- = 8.42deg angle.
- 15 sheets 11 groups configured
- One element radial refractive index profile
- Bowen ratio 0.78
- Inner Focus (the second lens group for focusing)
- Example 3
- Focal length f = 51.5mm
- Fno = 1.25
- = 45.6deg angle.
- Configuration 6 each group 10
- Two elements radial refractive index profile
- One aspherical surface 1
- Example 4
- Focal length f = 24.7mm
- Fno = 2.86
- = 82.4deg angle.
- Configure each group 11 10
- One element radial refractive index profile
- Rear focus (the third lens group and the second lens for focusing)
- The principle cause chromatic aberration
- Light is refracted at the interface of the lens
- Within the lens are not refracted rays
- The refractive index is different for each wavelength
- Element and the axial refractive-index distribution is
- Refractive index change in the direction of optical axis
- This patented technology is not used (as introduced)
- Element and the radial refractive index profile is
- Refractive index change in a direction perpendicular to the optical axis
- Rays are refracted at the boundary and both the lens in the lens (chromatic aberration occurs).
- Chromatic aberration can be corrected if appropriate refractive index profile
- Rather than spherical or aspherical, planar (flat glass), but I (easy processing)
- Canon’s patented
- Elements to create a radial refractive index profile optimized for each wavelength the refractive index profile is difficult
- Patented technology, the characteristics of chromatic dispersion (Abbe number, a partial dispersion ratio) to optimize, to compensate for chromatic aberration
- Optimize the calculation, line d, line C, line F, to compensate for chromatic aberration of four wavelengths simultaneously in the g-line
- Create a radial refractive index profile element as a mixture of resin
Source: [EG]
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Short range wireless communication
Canon has applied for a patent that would allow short range wireless communication between the lens and camera body, as well as the flash to camera body and live view to computer. This sort of technology could also be used for an electronic view finder.
Patent Publication No. 2012-2984
- 2012.1.5 Release Date
- Filing date 2010.6.16
Electrical contact
- Increasing contact for additional functions and a loss of compatibility with legacy equipment
- Problems such as dirt and wear
Radio
- Not a problem unique to the electrical contact
- Might be intercepted
Canon’s patented
- Short-range wireless
- Reduce the output of the radio, about 30 ~ 50mm and the radius of the wave communications
- Communication from the reach of the waves inside of the equipment is not leaking
- In range because there is only one model, no pairing
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Patent literature, self-interpretation and summary
A lot of diffractive optics patents have come about over the years, and we have yet to see a new product to join the 400 f/4 DO or 70-300 DO. Canon obviously sees value in the technology as they continue to research it.
Patent Publication No. 2012-2999
- 2012.1.5 Release Date
- Filing date 2010.6.16
Benefits of diffractive optical elements
- Can simultaneously reduce the chromatic aberration correction and lens length
- Perform light lens design
- Canon’s patented
- Type Tele Photo
- The first lens group
- Aspherical surface having a diffraction
- Reduce the number of lighter
- Spherical aberration is corrected by using a non-
- The second lens group
- Inner Focus
Source: [EG]
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Canon EF 100-400 f/4-5.6L IS Patent
We’ve previously shown a 100-400 in a patent, and it appears a second patent for nearly the same optical formula has come about.
EF 100-400 f/4-5.6L IS Optical Formula Patent
Example 1
- Focal length f = 102.20 – 390.01mm
- Fno. 4.10 – 5.90
- Half angle of 11.95 – 3.18 °
- Image height 21.64mm
- Lens Length 228.18 – 288.12mm
- Back Focus 51.23 – 69.84mm
- 3.82x zoom ratio
- Lens Construction 14 group of 19 images
Source: NL, PR via EG
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