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Bear in mind again to the nice previous days of March 2021, when a glint of hope surfaced displaying Canon was engaged on a set of fully new supertelephoto designs? Canon Rumors wrote then of a patent software surfacing that confirmed large, lovely, crazy-aberration-free lenses starting from a 200mm f/2 by way of to an 800mm f/5.6.
Effectively, that patent software has now been registered as an official Japanese patent. Every lens confirmed tailored designs, utilizing comparable ideas, moderately than throwing in teleconverting teams to double the focal size.
All the pieces else, within the meantime, went just a little sideways. Canon just lately opted to announce the discharge of differently-designed lenses, using magnification lens aspect teams on the present 400mm f/2.8 and 600mm f/4 choices, each based mostly on EF-mount designs from some years in the past.
The anticipated picture high quality of the recently-announced manufacturing lenses – tipped off through the picture top aberration graphs proven within the related patents – is a bit lower than the standard prompt by the graphs on this new patent. The graph above exhibits the brand new patent 600mm model’s anticipated variation from good (straight vertical strains). The 4 sorts of aberrations’ graphs look primarily like 4 straight, vertical strains, and might in all probability be thought-about functionally good. That mentioned, the picture high quality of the newly-announced supertelephotos is predicted to be laborious or unimaginable to differentiate from that of earlier Canon designs, which can disappoint few.
Canon selecting as a substitute to run with the older EF designs, with quality-munching teleconverting parts; the a lot increased pricing; and the dearth of RF-mount options akin to permitting built-in lens and sensor picture stabilization, have prompted the brand new manufacturing announcement to land with a little bit of a thud. No less than amongst discussion board dwellers, and particularly after Nikon launched (and final week began delivering in some international locations) its quick gentle, and three-times-cheaper 800mm f/6.3.
The lenses within the new patent, embody a 200mm f/2; a 400mm f/2.8; a 500mm f/4; an 800mm f/5.6 and a 300mm f/2.8.
As a result of the patent’s lenses all adjusted the design to the related focal size, none of these would produce manufacturing efficiencies in comparison with the introduced lenses, which share many parts. That is chilly consolation to Canon shooters who don’t seem like sharing in these efficiencies; the brand new variations costing roughly 20 p.c greater than earlier fashions.