Archive for: EF 600 f/4L IS II

Patent: Canon EF 600 f/4L IS III & EF 600 f/4 DO IS

Patent: Canon EF 600 f/4L IS III & EF 600 f/4 DO IS

A new patent showing the 600mm f/4 optical formula. Is Canon already working on the replacements to the current super telephoto lenses? It’s quite possible! Although I suspect we’re talking 7-10 years from now. These sort of patents could also be for technology that will appear in  other lenses. Such as the upcoming replacement of the EF 800mm f/5.6L IS.

I do expect we’ll be seeing more DO lenses in the future. There seems to be an awful lot of patents for DO optical formulas. I suspect the cost of production is the hinderance to bringing these lenses to market at the present time. We already have $11,000 200-400 f/4 lenses and $18,000 800mm lenses. I suspect we’re at the ceiling of what people will pay for a lens…. or not. :)

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

Source: [EG]

cr

12 Comments

Canon EF 600 f/4L IS II back in Stock

Canon EF 600 f/4L IS II back in Stock

From B&H Photo
The Canon EF 600 f/4L IS II is back in stock at B&H Photo for $12,799.

Canon 600 f/4L IS II for $12,999 at B&H Photo

From Norman Camera
Our friend Norman Camera is also selling the Canon EF 600 f/4L IS II via their Amazon store for $200 off.

Canon 600 f/4L IS II for $12,799 at Norman Camera (Via Amazon)

 

2 Comments

Canon EF 600 f/4L IS II in Stock at B&H Photo

From B&H Photo
B&H Photo has limited stock of the Canon EF 600 f/4L IS II.

Buy the Canon EF 600 f/4L IS II at B&H Photo for $12,999

cr

4 Comments

Canon 600 f/4L IS II in Stock at Amazon

From Amazon
Amazon has a limited quantity of the getting easier to find Canon EF 600 f/4L IS II.

Canon EF 600 f/4L IS II at Amazon for $12,999

cr

2 Comments

Canon EF 500 & 600 f/4L IS II in Stock at Norman Camera

From Norman Camera
The fine folks at Norman Camera have a small quantity of the Canon EF 600 f/4L IS II & Canon EF 500 f/4L IS II in stock and ready to ship.

Canon EF 500 f/4L IS II at Norman Camera $10,499

Canon EF 600 f/4L IS II at Norman Camera $12,999

c

8 Comments