Rumored specs
200 GBP sale at Amazon UK
https://www.amazon.co.uk/Canon-1-4L-USM-Lens-Camera/dp/B014IO02DS
Review
Sharpness is outstanding. It's in a different league to the Canon MkI at low F/numbers, and this is the sharpest 35mm F1.4 currently available.
Make it slightly cheaper, dear Canon. And I'll get one.
Some advanced tech from Canon. But not cheap.
At wide apertures lens has good level of sharpness but being quite soft at the edges. This is rapidly improving by f/2 and the centre is nice and crisp, with very good sharpness. The peak of central performance comes at f/4 where sharpness is excellent, then drops away gradually, still very good at f/8 but only fair at f/16 and f/22. The edges lag behind some way, but achieve good levels of sharpness between f/4 and f/8.
https://www.ephotozine.com/article/canon-ef-35mm-f-1-4l-ii-usm-lens-review-28614
Centre sharpness remains very high through from f/2 to f/11, with f/16 and f/22 being adversely affected by diffraction. The edges aren't quie as sharp as the centre, with f/4-f/11 producing the sharpest results.
http://www.photographyblog.com/reviews/canon_ef_35mm_f1_4_l_ii_usm_review/
Despite its very bright ƒ/1.4 aperture, the Canon 35mm ƒ/1.4L II is impressively sharp wide-open, on both full-frame and APS-C cameras. Given our expectations with Canon L-series lenses, we were hoping for a super-sharp lens, and the 35mm Mark II doesn't disappoint -- seriously fantastic sharpness from this lens, and a drastic improvement in sharpness compared to the original model!
Autofocus was quick and accurate, lens balanced nicely. Images look fantastic with lots of crisp, sharp detail, and the wide, bright aperture helps a lot when shooting in low light. It's also hard not to enjoy the wonderful, razor-thin depth of field and smooth out of focus blur that an f/1.4 aperture creates.
While the corner performance from this lens is not quite as good as what the center delivers, it remains impressive in its own right. Those using 22.3 megapixel-class or lower resolution full frame DSLRs will see very sharp corners natively and may question what I'm talking about. Those using ultra-high sensors that put lens performance under a microscope will see a touch of softness in the corners at f/1.4, even without regard to vignetting. By the time vignetting clears almost completely at f/2.8, even 5Ds R corners are looking really impressive.
http://www.the-digital-picture.com/Reviews/Canon-EF-35mm-f-1.4-L-II-USM-Lens.aspx
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