Canon Patent To Reduce Ghosting And Flaring (14mm f/2.8)

14mm f/2.8

Once more great Japanese site Egami (translated) spotted an important Canon patent. It is about the reduction of ghosting through anti-reflective coating on both sides of the lens, the coating consisting of fine uneven structures. Ghosting happens for instance when you point your lens at a bright light source, like the sun, and are the result of an acute angle of light bouncing (reflecting) between the individual glass elements of the lens. The technology is filed using a 14mm f/2.8 lens as engineering example. Should work well on other wide angle lenses too.

Surface coating
  • Patent Publication No. 2012-159720
    • 2012.8.23 Release Date
    • 2011.2.1 filing date
  • Example 1
    • F = 14.3mm focal length
    • Fno. = 2.89
    • Half angle of view ω = 56.5deg.
    • 14 images in 10 groups lens configuration
    • 1 UD glass sheet
  • Canon patent
    • Suppress the occurrence of the ghost
    • Having two surface anti-reflection surface of fine uneven structure
      • Non-periodic pitch
      • 400nm 300nm pitch less than average
    • Incident light for various interference conditions to cancel the reflected light is maintained
    • The average height of uneven surface with two different
    • 0.001% or less (2) the product of the reflectance of the surface (incident angle 0 degree)
    • 0.1% or less (2) the product of the reflectance of the surface (incident angle 60 degrees)
    • 0.05% more than the absolute value of the difference between the reflectance of the surface (2), (0 ° angle of incidence)
    • 0.2% or more the absolute value of the difference in reflectance of the surface (2), (incident angle 60 degrees)
    • The anti-reflection film of aluminum and aluminum oxide
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Lightroom 4.2 And Camera Raw 7.2 Release Candidates Available For Download

[shoplink 2813]Lightroom 4.2[/shoplink] and Camera Raw 7.2 RCs can be downloaded at Adobe Labs. Various bug fixes and support for the following Canon cameras: [shoplink 5623]Rebel T4i/650D[/shoplink] and [shoplink 6091]EOS M[/shoplink]. Moreover, Camera Raw now has lens profiles for the following lenses with Canon mount:

  • Canon [shoplink 2163]EF 24mm f/2.8 IS USM[/shoplink]
  • Canon [shoplink 2165]EF 28mm f/2.8 IS USM[/shoplink]
  • Canon [shoplink 5686]EF 40mm f/2.8 STM[/shoplink]
  • Canon [shoplink 6295]EF-S 18-135mm f/3.5-5.6 IS STM[/shoplink]
  • [shoplink 5573]Sigma 18-250mm f/3.5-5.6 DC OS HSM[/shoplink]
  • Zeiss Distagon T* 2/25 ZE
  • Zeiss Distagon T* 1,4/35 ZE
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New Firmware For EOS 1D-X Released (ver. 1.06)

Yesterday Canon released a new firmware for the EOS 1D-X. See below for the delivered fixes. The firmware can be downloaded from here. Check the following shops to order the EOS 1D-X: Amazon US (click here), DigitalRev (click here), Adorama (click here) and B&H (click here). The usual list price is $6,799.

Firmware Version 1.0.6 incorporates the following fixes.

1. Fixes a phenomenon in which the AF Microadjustment cannot be correctly carried out.
2. Fixes a phenomenon such that when using the camera with combinations of certain lens *1) and extender *2) the images
captured become back-focused.
*1) EF 70-200m f/2.8L IS II USM or EF200mm f/2L IS USM
When used with
*2) Extender EF 1.4x III or Extender EF 2x III
3. Fixes a phenomenon in which, when the camera is powered on in very dark environments (including instances when the lens
cap or the body cap is attached), Error 80 appears on the camera.
4. Fixes the following phenomenon: if two CF cards are inserted into the camera and the “Standard” or “Auto switch card”
settings is selected for the recording method for [Record func+card/folder sel.], and then one of the CF cards is removed
and then reinserted into the card slot, the card selected for recording and playing back images may be switched to the other
CF Card.
5. Fixes a phenomenon in which the AF microadjustment value is not correctly displayed in the EXIF information of the images captured.
6. Displays a “O” or “X” result to indicate whether images have been successfully transferred through the FTP protocol when using the
FTP protocol when using the WFT-E6 Wireless File Transmitter.

Firmware Version 1.0.6 is for cameras with firmware up to Version 1.0.3. If the camera’s firmware is already Version 1.0.6, it is not necessary to update the firmware.
* The firmware update takes approximately seven minutes.

The new Firmware Version 1.0.6 can be downloaded by clicking here.

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[Review] Canon EOS 1D-X vs Nikon D4 – And The Winner Is…

Kai and the crew at DigitalRev compared Canon’s and Nikon’s flagships: the [shoplink 4119]EOS-1D X[/shoplink] vs the Nikon D4. Sort of Battle of the Titans :-). So, if you want to learn which one is better, then have a look at this 11:32min video. Funny as usual. Check the following shops to order the EOS 1D-X: Amazon US (click here), DigitalRev (click here), Adorama (click here) and B&H (click here). The usual list price is $6,799.

EOS 1D-X price check: [shopcountry 4119]

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Learn How To Change The Focusing Screens On An EOS 60D

You probably know that you can change the focusing screen on your Canon DSLR. The video above shows hot to do it on an [shoplink 335]EOS 60D[/shoplink]. Btw, until September 1st the EOS 60D can be bought with a $100 rebate (click here) at B&H. The rebate applies to body only and to various kits. Adorama is also offering the rebates (also until 9/1), click here to see all bundles. They also have a refurbished 60D for $799.95 (click here).

There are three focusing screen available for the 60D (the screens cost $36 at the Canon Store and $32.95 at B&H):

  • Focusing Screen Ef-S (Canon Store and B&H). The Canon Ef-S Focusing Screen is optimized for wide-aperture lenses from f/1.8 to f/2.8. Areas that are slightly out of focus appear more out of focus, making it easier to tell when focus is right-on. Ideal for users who frequently manually-focus in dim light with fast lenses.
  • Focusing Screen Ef-D (Canon Store and B&H). The Canon Ef-D Focusing Screen is a precision matte surface with etched grid lines to assist composition. The camera’s AF points remain fully visible. Focus characteristics are suited to most lenses.
  • Focusing Screen Ef-A (Canon Store and B&H). The Canon Ef-A Focusing Screen is a standard precision matte surface. It is ideal with most lenses including zooms f/3.5 through 5.6.
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