[Patent] Canon’s New EF 600mm f/4 and EF 400mm f/2.8 Lenses

600mm f/4

400mm f/2.8

Japanese site egami (Google translated) spotted two new Canon patents. The patents refer to the EF 600mm f/4 and the EF 400mm f/2.8 lenses. The lenses will have reduced size and weight. The 600mm will have 15 elements in 9 groups, the 400mm 14 elements in 9 groups (more specs below). Performance charts:

Performance Chart 600mm f/4

Performance Chart 400mm f/2.8

More specifications (machine-translated)…:

  • Patent Publication No. 2012-88427
    • 2012.5.10 Release Date
    • 2010.10.18 filing date
  • Example 1
    • Focal length f = 585.00mm
    • Fno 4.12
    • Image height 21.64mm
    • Length 468.50mm lens
    • BF 90.78mm
    • 15 sheets of 9 group lens configuration
    • One aspherical surface a
    • 2 UD glass sheet
    • One fluorite
    • A plane diffraction
  • Example 2
    • Focal length f = 391.86mm
    • Fno 2.88
    • Image height 21.64mm
    • Length 367.51mm lens
    • BF 50.01mm
    • Lens Construction 14 elements in 9 groups sheet
    • 2 2 aspherical surface
    • 1 UD glass sheet
    • One fluorite
    • A plane diffraction
  • Group 3 consists of positive and negative positive
  • Inner Focus (group 2)
  • Strengthen the refractive power of the front lens group, and to shorten the overall length, the sensitivity is increased, it is difficult to manufacture and assembly
  • The number of lens group at the end of the super-telephoto lens is determined by the balance of the total length and chromatic aberration
    • And shorten the length and reconcile, the correction of chromatic aberration, the number will increase
      • It is important to the length of each degree
    • Weight of the first lens group, 70% to 9 on the whole
      • Canon patents is reduced to three the first group
      • Aspherical and one eye in group 1 group, field curvature correction, the distortion
      • Diffractive optical element and the second two groups in the first group, the chromatic aberration correction
[egami via CR]

[Rumor] More Canon Mirrorless Information Leaking (June Announcement Confirmed)

www.davidriesenberg.com

I report and sum up the Canon mirror-less news i got in the last few days. My source told me that a Canon mirror-less camera will indeed be announced next month, in June. I’ve been told that the camera will  have a 4:3 ratio sensor and that it looks a little like Nikon’s V1 (but will be much much better a camera than the V1 :-) ). This means it will could have the sensor of the PowerShot G1 X (good!) and it will have a modern look, not vintage-style as other mirror-less cams. Unlike most of the renderings and concepts we saw floating around the Web in the last months, the upcoming Canon mirror-less cam will not be a vintage designed range-finder camera. In other words: it will not look like the Fuji X100 or the Olympus E-M5.

No mention so far about the lens-mount it will have. I wonder if the pancake lens I reported about yesterday has something to do with the upcoming mirror-less system camera by Canon. I mean: a pancake lens seems to be made for ILCs, but will it mount natively or will it need an adapter? That’s a big question in my opinion. There is such a lot of outstanding Canon lenses that I really hope Canon will deliver an easy yet fully functional way (read: adapter) to use these lens on its upcoming Interchangeable Lens Camera. I heard also some rumors saying that the camera will/could have an EF-S mount. Given the race to always smaller ILC bodies, I think this is not very plausible. But then: who knows.

What follows are my very own thoughts about the whole Canon mirrorless 4/3 thing:

  • I hope Canon will make a light-weighted camera – I always had DSLRs, and as much as I like them, I do not like the bulk that comes with them
  • Let us use the whole range of EF lenses in their full functionality (i.e. all features including IS and AF, camera controlled aperture and exposure)
  • We want the EF-adapter, do not overprice it!
  • Give us full cross-compatibility with the EOS system
  • Give us some light and small prime lenses (and maybe a couple of zooms) made specifically for the ILC
  • Give us a cool kit lens, but make it really cool & smart
  • Give us an ILC with high ISOs, and with good high ISO performance (Canon, you can do it!)
  • Please keep the price at a reasonable level, at least lower than $800 (kit lens included) – The PowerShot G1 X is a fine camera with an outstanding lens, but a little overpriced IMHO
  • And finally: surprise us with an amazing sensor. Canon has so much sensor science and skills, they can do it.

There is only one thing given for granted: June will be a hot month for Canon fans! :-)

[Rumor] EF 40mm f/2.8 Pancake Lens

Photobucket Pictures, Images and Photos

Looks like Canon will announce a new, affordable so-called pancake lens in June (no, not the one in the picture above), together with the T4i/650D and a mirrorless camera. “pancake” because such a lens is small and light. It’s rumored to be an EF 40mm f/2.8, and it will not be an “L” lens. Price should be <$300. This would be a nice addition to the huge Canon lenses family. An EF-S 18-135 IS II is also rumored to be announced in June. Lot’s of news coming from Canon next month!

[via CR]

[Rumor] New 70D and 7D Mark II Specs Surfaced

canonrumors breaks the news again with updated specifications of the upcoming APS-C cameras EOS 7D Mark II and EOS 70D. Both are expected to be announced for Photokina 2012. If these cameras will be announced in September, then the specifications should be already defined. Looks like the next xxD and xD iterations will both have an 18MP sensor, though it is not clear if it will be an updated sensor. Could this possibly be the definitive specs of the next two APS-C Canon cams…?

EOS 70D

    • Digic 5
    • 18mp
    • 100% viewfinder with grid lines like 7D
    • 19 AF Points from 7D
    • Continuous AF in LiveView & Video Recording
    • September Announcement

7D Mark II

    • Dual Digic 5
    • 100% viewfinder
    • 61 Point AF from 5D Mark III
    • Announced after 70D