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juststeve wrote:
I would find it interesting if Sigma were to make a version of the new 100-400 targeted at mirrorless cameras, even m4/3.
Perhaps a design for mirrorless cameras could be even a bit smaller with most of those cameras having mount openings in the 47-48 mm range and m4/3 smaller still. The Panny 100-400 is nicely sized but only available for m4/3 and a bit pricey. The Fuji 100-400 is quite large and seems not to be of the highest optical quality. Canon M5 and M6 users can adapt the 100-400 Mark II and have a great performing lens but it is pricey unless you already own one and is bulky in comparison to the camera. I imagine a compact version available for Sony would go over well too....Show more →
I would expect a 'mirrorless version' to be longer and a bit heavier assuming the same specs as a DSLR version, because it needs more 'tubing' because of the flangeback difference. There is nothing to gain for tele lenses when going mirrorless, they are only small if different trade-offs are made like slower aperture, slower AF, less solid mechanics etc.
An example of this is the Olympus m43 4/300mm 'Pro' lens which despite its optimization for smaller sensors is heavier than the Canon 4/300IS full frame lens... Of course, many Olympus users will claim it really is a '4/600mm lens' and should be compared with the Canon 4/600L, but this is nonsense. Of course, this Olympus lens is optically very high quality, and mechanically (IS performance, weather sealing etc.) also superior to the Canon 4/300IS. But they are both 4/300mm lenses and the Canon covers a much bigger sensor for far less money ...The same applies for many other mirrorless tele/zoom lenses; mirrorless lenses only have size/weight advantage in a relatively small focal length range.
As to the Canon 100-400, it would make sense that if they are getting serious about mirrorless that they make a 100-400 or 200-600 lens that is more optimized for size and weight than the 100-400II. But this means some compromises in aperture, build quality, AF speed, optical quality etc. (and probably much lower price, depending on what price level the new FF mirrorless body will be).
Edited on May 19, 2017 at 12:24 PM · View previous versions
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