Patent: Canon EF 35 f/1.4L II

[Canon Rumors]

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Canon EF 35 f/1.4L Patent
A new patent for a 35mm f/1.4 optical formula has appeared. This is the first to appear since 2011 in regards to an updated 35 f/1.4L. View the previous patent here.

Canon EF 35 f/1.4L II?

Patent Publication No. 2012-123155

• 2012.6.28 Release Date
• 2010.12.8 filing date

Example 1

• Focal length f = 34.73mm
• Fno. 1.45
• Half angle of 31.92 deg.
• Image height 21.64mm
• Length 128.11mm lens
• 38.48mm back focus
• An effective diameter of 52.03mm lens
• Effective diameter aperture 25.52mm
• Lens Construction 12 elements in 9 groups sheet
• 2 2 aspherical surface
• 2 UD glass sheet

Retrofocus

• And retro focus lens optical system focal length is shorter than the length of the optical system
• Increasingly asymmetric refractive power arrangement must be strengthened a negative refractive power of the front group in particular
• Coma aberration, astigmatism, spherical aberration occurs
• Order to secure a back focus must be to increase the ratio retro

Source: [EG]

cr

 

[hoghavemercy]

will it likely come out this year?? i'd rather wait on this than the 24-70L II

[ksuweh]

There isn't much room for improvement on the current version of this lens. Although Canon has been coming out with some lenses lately that are close optical perfection. I would be interested in trying this new lens out!

[Mt Spokane Photography]

will it likely come out this year?? i'd rather wait on this than the 24-70L II

Very few patents are actually produced, so don't count on it.  Several other 35mm patents have been released recently, and most of them never happened.  Its common that a patent is released after a lens hits the market, but occasionally one appears earlier due to some delay in production.

[preppyak]

There isn't much room for improvement on the current version of this lens. Although Canon has been coming out with some lenses lately that are close optical perfection. I would be interested in trying this new lens out!

They might add weather sealing to it, which is one thing its missing in relation to the newer L lenses. But yeah, aside from that and some new coatings, I'm not sure they can drastically improve it in any way.

[RLPhoto]

If its better than the 24L II, I may add this to my kit.

[Stone]

There isn't much room for improvement on the current version of this lens. Although Canon has been coming out with some lenses lately that are close optical perfection. I would be interested in trying this new lens out!

The current version is 14 years old and could benefit from Canon's new optical formulas, having used a couple of copies for various shoots, wide-open sharpness definitely has room for improvement especially in the corners.

[Norkusa]

I recently sold my 50L to get the 35L. Wasn't sure about switching at first but now the 35L is my new favorite lens. MUCH sharper than my old 50L. I'd say the image quality is on par with the 100L.

Aside from weather sealing, I really can't see much room for improvement.

[RC]

Come on Canon, lets get a date and price announced...and please be reasonable on the price increase. 

[ddhacor]

Okay, I've hung around here long enough and learned great amounts and been entertained at the same time. Can someone point me in the direction of a post (I've searched) or answer me this:
How exactly do you read these patents when they come out? I see the aperture and the film plane, but what about the focal length? Is it apurture-FP? Is it the same basic concept in all modern lenses?
Thanks,
Bob

[neuroanatomist]

How exactly do you read these patents when they come out? I see the aperture and the film plane, but what about the focal length? Is it apurture-FP? Is it the same basic concept in all modern lenses?

Focal length is the distance between is rear nodal point with the lens at infinity focus and the sensor/film plane.  Note that the rear nodal point is an optical point which depends on lens design, may not fall within the physical dimension of the lens.  Most telephoto lenses have the rear nodal point right behind the front element.

[AdamJ]

Come on Canon, lets get a date and price announced...and please be reasonable on the price increase.

lol

[wickidwombat]

dammit I was just about to buy a 35L this week! now I dont know what to do

maybe I should get the shorty 40 and the siggy 120-300 while i wait for this to come out

[UpbeatCynic]

The new 35mm 1.4 is likely to follow the 24-70 II's pricing pattern, so I'd buy now; and if you want to upgrade when/if the new version comes out, I'd sell it for a minimal loss. 

[wickidwombat]

The new 35mm 1.4 is likely to follow the 24-70 II's pricing pattern, so I'd buy now; and if you want to upgrade when/if the new version comes out, I'd sell it for a minimal loss. 

good thinking too   
the mk1 24-70s have climbed in price steady since the mk 2 price was announced