Canon patent for EF-M 600mm f / 5.6 DO IS lens

EF-M 600mm f / 5.6 DO IS

Canon filed a patent for a EF-M 600mm f / 5.6 DO IS, a lens with diffractive optics for the EOS M system.

  • Patent Publication No. 2015-215437
    • Published 2015.12.3
    • Filing date 2014.5.9
  • Example
    • Focal length 585.00
    • F-number 5.74
    • Half angle (in degrees) 1.34
    • Image height 13.66
    • Overall length of the lens 299.25
[via Egami]

Canon EF 600mm f/4 BR DO prototype shown at Canon Expo 2015

Canon EF 600mm F/4 BR DO Prototype Shown At Canon Expo 2015

Canon prototype gear on show at Canon Expo 2015 in NYC. After having posted a picture of the 120MP DSLR prototype, Popular Photography Magazine posted another picture. The EF 600mm BR DO is on display, a “semi-working version”. A patent for such a lens showed up back in July.

The BR stays for Blue Spectrum Refractive Optics, a technology Canon announced in August. BR corrects chromatic aberrations. The technology will be seen first on the Canon EF 35mm f/1.4L II.

The image below shows how the lens will look when finalised.

canon 60mm BR DO

Canon Patent For 600mm f/4 Lens

Canon Patent

Egami (translated) spotted a patent filed by Canon for a new 600mm f/4 lens. Egami suggests the lens will be ready for Tokyo Olympic Games in 2020 and the Rio de Janeiro Olympic Games in 2016.

  • Patent Publication No. 2014-26210
    • Publication date 2014.2.6
    • Filing date 2012.7.30
  • Example 1
    • Focal length f = 588mm
    • Fno. 4.12
    • Angle of view 2ω = 4.22 °
    • BF 56.0mm
    • Total lens length 374.7mm
    • Inner focus
  • Example 5
    • Focal length f = 588mm
    • Fno. 4.12
    • Angle of view 2ω = 4.22 °
    • BF 55.0mm
    • Total lens length 343.5mm
    • Inner focus
    • Diffraction optical element
  • Effect of the glass material
    • Fluorite (Fluorite)
      • In the long lens fluorite + total length, correction of chromatic aberration is easy
      • In short lens fluorite + total length, correction of chromatic aberration is difficult
    • Diffractive optical element (DOE)
      • Diffractive optical element can be corrected if the chromatic aberration
      • Flare caused by light diffraction

Canon EF 600mm f/4L IS II USM Lens In Stock

Canon EF 600mm f/4L IS II USM Lens In Stock

B&H has the Canon’s EF 600mm f/4L IS II USM Telephoto lens in stock and ready to ship for $12,999 (click here). Limited quantity.

Product description:

Canon’s EF 600mm f/4L IS II USM Telephoto Lens has all the upgrades needed to make it the go-to super long telephoto lens for professional photographers and anyone who has the highest standards for the gear they use.

First and foremost, image sharpness is enhanced with fluorite optics that deliver reduced chromatic aberration. The lighter weight (3 lbs lighter due to magnesium and titanium construction elements) is always welcome in very large telephoto lenses. Using 3 IS (Image Stabilization) modes allows you to shoot at shutter speeds 4 stops slower, and the advanced third IS mode activates only when the shutter button is fully pressed, so you can pan with fast-moving subjects without the IS function interfering with composition and framing.

Dust and water sealing keeps the lens functioning even in less than ideal conditions, and a Power Focus mode allows smooth focus change while shooting video.

Fluorite optics for sharper images and less chromatic aberration.

Lighter weight due to magnesium and titanium construction elements.

Three IS (Image Stabilization) modes offer a 4-stop shutter speed advantage.

Advanced image stabilization Mode 3 activates only when shutter button is fully pressed, allowing for panning to follow fast-moving subjects.

Inner focusing system with focusing cam

Power Focus mode allows smooth focus change when shooting video.

Dust and water sealing for shooting in the most challenging environments.

Canon’s EF 600mm f/4L IS II USM Telephoto Lens In Stock At B&H

Canon's EF 600mm f/4L IS II USM Telephoto Lens In Stock At B&H

[source: The Digital Picture]

B&H has the Canon EF 600mm f/4L IS II USM lens in stock and ready to ship for $12,999 (click here).

Specs:

 

  • Fluorite optics for sharper images and less chromatic aberration.
  • Lighter weight due to magnesium and titanium construction elements.
  • Three IS (Image Stabilization) modes offer a 4-stop shutter speed advantage.
  • Advanced image stabilization Mode 3 activates only when shutter button is fully pressed, allowing for panning to follow fast-moving subjects.
  • Inner focusing system with focusing cam
  • Power Focus mode allows smooth focus change when shooting video.
  • Dust and water sealing for shooting in the most challenging environments.

Firmware Upgrades For Wireless Transmitter WFT-E5A And 4 Lenses

Canon has recently released two new product advisories. The first one concerns the WFT-E5A Wireless Transmitter. The firmware upgrade (ver. 1.0.7) doesn’t tackle problems or malfunctions, it was released to support the just released, massive firmware update for the EOS 7D.

Next, Canon also released a product advisory for the following lenses: EF 300mm f/2.8L IS II USM, EF 400mm f/2.8L IS II USM, EF 500mm f/4L IS II USM, and EF 600mm f/4L IS II USM. The firmware update (ver. 1.1.1) will be performed by Canon Service Centers and brings the following enhancement:

Changes the control algorithm of the focus drive, and enhances the drive’s responsiveness for more precise focus and adjustments. In particular, the new firmware enhances the AI servo AF capability of the lenses to track objects that move irregularly in sports events, such as soccer or rugby.

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