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It was revealed solely right now, however Canon submitted its 135mm f/2 lens design (Japanese) again in September 2020. 4 variations are proven, starting from 11 parts to 14 parts.
The designs seem to sport fairly good picture high quality, going by the theoretical, calculated “sea grass” graphs that seem in Japanese lens design patents. A visit again to Canon’s most up-to-date 135mm f/2 patent (2018) reveals that these new ones examine favorably.
[Tip to lens geeks: Bill Claff’s Photonstophotos.net site incorporates a long list of lenses that he’s matched up with their corresponding patents, along with a mesmerizing ray tracing application that shows how light interacts with the patent design elements. Very handy.]
CanonRumor’s RF Lens Roadmap sports activities an f/1.4 model of a 135mm prime, not an f/2. Had been Canon to provide an f/1.4 mannequin, it might one-up the wonderful Sony and Sigma f/1.8 lenses of that focal size.
Sigma dallied with a super-long f/1.4 design with its 105mm Artwork prime, a lens that induced some portraitists to start out utilizing a tripod. Canon’s designs are sometimes lighter than these of Sigma, nevertheless it’s onerous to think about a 135mm f/1.4 that weighs lower than 3.5 kilos. The brand new 135 f/2 design seems to be sized equally to the outdated EF mount mannequin.