Archive for: patents

New 65 f/2.8 & 180 f/3.5 Macro Patents

New 65 f/2.8 & 180 f/3.5 Macro Patents

65 f/2.8 Macro

Patent Publication No. 2011-191743

  • 2011.9.29 Release Date
  • Filing date 2010.2.16

Example 8

  • Focal length f = 65.00mm
  • Fno 2.90 – 3.05 – 3.96
  • Half angle of 18.41 °
  • Image height 21.64
  • 145.08mm Length Lens
  • Back Focus 38.20 – 47.63 – 37.80mm
  • Positive and negative lens group of positive and negative 4
  • Inner Focus + Rear Focus
  • Group 2, Group 3, Group 4 to move the focus method
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Canon Patents This Week

New Macros and Tilt Shifts Coming?
Recent patents have shown new Macro and Tilt-Shift lenses. Below I’ve listed them.

Explain a patent
You cannot patent a lens per se, but you can patent an optical formula. I think it’s safe to talk about patents, as many of them have turned into actual consumer products.


Canon 50mm 1:1 f/2.8 Macro


 


Canon 90mm f/2.8 Tilt Shift

 


Canon 35mm f/2.8 1:2 Macro

 

Patent Publication No. 2011-107313
Published 2011.6.2
Filled 2009.11.16

50mm f/2.8 1:1 Macro

  • Focal distance f=50.20mm
  • Fno=2.90
  • Half angle of view 23.32 deg.
  • Image height 21.64mm
  • Lens length 84.64mm
  • Back focus 40.01mm
  • Macro -0.950x

90mm f/2.8 Tilt Shift

  • Focal distance f=90.40mm
  • Fno=2.90
  • Half angle of view 17.90 deg.
  • Image height 29.20mm
  • Lens length 117.18mm
  • Back focus 65.43mm
  • Macro -0.480x

35mm f/2.8 1:2 Macroa

  • Focal distance f=35.20mm
  • Fno=2.90
  • Half angle of view 31.58 deg.
  • Image height 21.64mm
  • Lens length 102.44mm
  • Back focus 40.10mm
  • Macro -0.480x

 

cr

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EF 16-40 f/4L IS [CR1]

EF 16-40 f/4L IS [CR1]

A replacement to the 17-40 f/4L?
Apparently a patent for an EF 16-40 f/4L IS will be filed soon and I’m told to keep an eye for it over the next couple of weeks.

CR’s Take
The 17-40 is one of the best values in “L” lenses and is a cash cow for Canon. It does need improvements on the edges and Nikon stabilized their f/4 full frame wide angle. It’s a believable replacement.

cr


Canon EF 17-40 f/4L $839 @ B&H

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Cool Tamron Patent

Cool Tamron Patent

I know, I said “cool” and Tamron in the same sentence. It’s true though.

Want to IS/VC your lenses? Just add this converter!

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