Tamron filed a patent for what appears to be an update to the current SP AF10-24mm F/3.5-4.5 Di II lens. For comparison, here is the current model:
The interesting part is that Nikon's optical design for the Nikkor AF-S 10-24mm f/3.5-4.5G ED is almost identical:
Paten details:
- Patent Publication: 2010-249959
- Published on 11/04/2010
- Filled on 04/13/2009
- Focal distance f: 10.29-23.3915mm
- Fno (aperture): 3.6-4.6
- Angle of view: 111.4-62.6deg
- Aspherical lenses: 4
Via Egami
