Tamron working on 70-200mm F4 VC full frame lens for DSLRs(Canon, Nikon and Pentax). The lens features constant F4 aperture and optical stabilization. We hope that Tamron will keep the price of Lens low compared to Canikon 70-200mm F4 Lenses.
Patent Publication No. 2016-126278
Published 2016.7.11
Filing date 2015.1.8
Example 1
Focal length 71.8092 109.9915 205.9615
F-number 4.0989 4.1033 4.1023
Half angle of 16.7567 10.8972 5.8621
Patent of Tamron
Positive and negative positive positive and negative 5-group zoom
Inner zoom
Inner focus
Vibration control
Take a look at more Tamron lens patnet
The existing 70-200mm F/2.8 is sharper than the Nikon’s version which is due to be replaced by 2017. I hope Tamron also replace their 70-200mm f/2.8 and look into something special for 300mm or 400mm F4 primes.
I am just reaching this stage where I am ready to start splashing some cash on lenses and Tamron is tempting if they can give some love in the telephoto-handholding range.
Agree