Tamron patent discloses a new 300mm f/2.8 for Full Frame mirrorless camera.
Egami (translation here) spotted a new Tamron patent describing a 300mm f/2.8 lens for a Full Frame mirrorless camera system. As you know Sony Corporation maintains an 11% share hold in Tamron (Source: Wikipedia). So this lens may be designed for FF NEX cameras…
P.S.: Tokina just admitted that The Kenko 400mm f/8.0 lens for Sony E-mount has a defect on the shutter. You should contact Tokina to exchange the lens (Source: DC.watch).
Hubertus Bigend
5 months ago |1. What’s special about that new 300/2.8 design seems to be the stepping motor and the optical design being optimized for as little mass as possible that has to be moved while focusing. The diagram would suggest a flange distance that would well be suited for DSLRs (SLTs), too.
2. From what I read in the DC.watch Google translation, the Tokina lens has no such thing as a shutter (which would probably be a world’s first for a catadioptric telephoto lens as well as for a mirrorless camera lens
, but the camera may refuse to release the shutter when the lens is attached (even when “release without lens” is allowed in the setup).
spam
5 months ago |Agree, there’s no reason to design a 300mm F2.8 with a lens so far back that it would prevent it from being adapted to any of the most common flange distances. Also, the use of stepper motors don’t mean it’s just for mirrorless cameras, stepper motors can be used for phase detect focus as well. Canon do that with their two new STM-lenses.
Stepper motors are better for contrast detect focus though which might mean that the new design will be used for mirrorless systems, but I’d expect the lens to show up in EOS and F-mount first. A 300 F2.8 is hardly the first lens Sony would want for a fullframe NEX.
Designing a 300 F2.8 for smaller than FF image circle don’t make much sense as the lens wouldn’t get much smaller or cheaper by desinging for APS-C and Tamron would have to make seperate FF-versions in stead of having one design that would fit all systems.
The Tokina lens is a mirror lens with no shutter or (adjusatble) aperture.
Hubertus Bigend
5 months ago |Right, thanks for the additions.
There’s one open question though, and it probably will need some testing with real products to become answered: Can a design that tries to make the focusing lens group very small still deliver the same image quality?
Canon
5 months ago |Excellent. Make bigger lenses and have them mirrorless losers come back to the dslr. Can’t use what you can’t hold with those dinky little bodies. Heheheehee.