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October 30, 2013
Posted in Rumors

More Sigma “Sport” Lenses Coming in 2014

Sigma "Sport" Lenses

Sigma 18-35mm f/1.8 DC HSM
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It appears that Sigma will enjoy us with more lenses based on their new technology. Various lenses that will be part of the “Sport” line-up may be announced. The rumor fits with the rumored list of next Sigma lenses we posted aome time ago.

The rumor has word that Sigma will announce first a 300mm f/2.8 OS and a 400mm f/2.8 OS lens. These lenses may be undergone field-testing during the Winter Olympic Games. The other lenses Sigma is said to work on are a 500mm and a 800mm lens.

I can just hope Sigma will again be able to pack all the engineering wizardry they put into the awesome 18-35mm f/1.8 DC HSM and 35mm f1.4 DG lenses.

[via CR]

April 30, 2013
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Posted in Rumors

Rumor: New Canon EF 800mm f/5.6L IS II Lens Could Be Announced Fall 2013

EF 800mm f/5.6L IS II

A rumor concerning the replacement of the replacement of the Canon EF 800mm f/5.6L IS USM (price & specs) lens.

The Canon EF 800mm f/5.6L IS II could be announced shortly after the Canon EF 200-400 f/4L IS 1.4x has (eventually) started shipping. According to the latest rumors this could due in Fall 2013. However, if there will be an announcement it will be a development announcement. Regarding used materials the new EF 800mm f/5.6L IS II will have a new build type, the optical formula is said to be “nearly identical” but improvements in vignetting and sharpness are possible.

Finally, some sources say the EF 800mm f/5.6L IS II could have a built-in teleconverter.

This will not be a cheap lens: the actual Canon EF 800mm f/5.6L IS USM has a price tag of $13,249.

Canon EF 800mm f/5.6L IS USM price check: Amazon, B&H, Adorama, Canon USA, J&R, Digitalrev, Borrow Lenses, eBay

[via CR]

December 7, 2012
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Posted in Rumors

Canon Set To Release An EF 800 f/5.6L IS II Lens In 2013?

Canon Rumors has been told that Canon could release a new 800mm in 2013. The EF 800 f/5.6L IS II lens could have a newly developed 6 stops image stabilization system. The weight is said to be less than the EF 600 f/4L IS II

Moreover, there are rumors about new supertelephoto zooms and 400mm primes. No timetable or schedule was suggested.

Finally the 1.4 teleconverter sported on the EF 200-400 f/4L IS 1.4x is said to get featured on more lenses in the future, at least the technology appears to be tested on other lenses.

[via CR]

 

November 20, 2012
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Posted in Rumors

Canon EF 800mm f/5.6 IS To Be Replaced Soon?

Photobucket

Is Canon set to replace the $13,299 EF 800mm f/5.6 IS? Canon Rumors has

been told on a few occasions that a replacement of the EF 800 f/5.6L IS is coming. An announcement could come as early as late Q1/Q2 of 2013. The new lens would incorporate Canon’s new weight saving technology.

Canon EF 800mm f/5.6 IS price check: Amazon, B&H, Adorama, Canon USA, J&R, Digitalrev, Borrow Lenses, eBay

 

October 24, 2012
Tags: , ,
Posted in News

Rumor: New Canon Lenses Around The Corner?

New Canon lenses rumor tidbits. Canon Rumors got another confirmation that a Canon EF 800 f/5.6L IS II lens is out there getting tested. It is not ready for the market and it is suggested that Canon will not announce it before Nikon announced its own 800mm lens. Another lens was mentioned, the EF 200 f/2L IS, also said to be far from being announced. Finally, one of CR’s sources says that he or she tested an ultra-wide zoom on an EOS-1D Xs (which, supposedly, is the big megapixel DSLR rumors say Canon is working on).

But the Canon lens rumor-mill is also yielding some tidbits about an EF 135mm f/2L replacement. The talk is about an EF 135mm f/2L prototype with image stabilization. Replacement of the current EF 135mm may be around the corner.

It appears as if there are definitely coming new lenses before the end of 2012, some NDAs (non disclosure agreement) should be over by the end of the month.

[via CR]

July 12, 2012
Tags: ,
Posted in patents

[Patent] Canon Files Patent For 600mm f/5.6 and 800mm f/5.6

600mm f/5.6 DO

800mm f/5.6 DO

Egami (machine translated) found a patent filed by Canon for a 600mm and a 800mm f/5.6 lens using diffractive optical elements.

  • Patent Publication No. 2012-123152
    • 2012.6.28 Release Date
    • 2010.12.8 filing date
  • Example 1
    • Focal length f = 584.99mm
    • Fno. 5.80
    • Half angle of 2.12 deg.
    • Image height 21.64mm
    • Length 360.03mm
    • BF 94.84mm
    • 17 pieces in 10 groups Lens Construction
    • 3 UD glass sheet
    • One fluorite
    • A surface diffraction plane
  • Example 3
    • Focal length f = 779.00mm
    • Fno. 5.80
    • Half angle of 1.59 deg.
    • Image height 21.64mm
    • Length 462.02mm
    • BF 120.29mm
    • 17 pieces in 10 groups Lens Construction
    • 2 UD glass sheet
    • Two fluorite
    • A surface diffraction plane
  • Low dispersion material with anomalous partial dispersion
    • To be effective in the correction of chromatic aberration
    • Specific gravity is large (heavy)
      • 3.18 fluorite
      • FK01 3.63
      • The specific gravity of small anomalous partial dispersion glass material
        • FK5 2.46
        • BK7 2.52
    • Surface may be damaged easily
    • FK01 is fragile due to temperature changes and large diameter
  • Diffractive optical element (DOE)
    • To be effective in the correction of chromatic aberration
    • Is generated by unwanted light flare and ghosting
  • Canon’s patented
    • Become positive from negative to DOE
    • DOE to place the position is hard to unwanted light incident
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