Re: Official: Tamron 70-180mm F/2.8 Di III VC VXD G2 Nikon Z Mount Announced
Ripolini wrote:
Tamron 70-180 Di III VXD and Nikon Z 70-180 are the SAME identical lens as data provided by Tamron and Nikon show unambiguously: same optical scheme, same MTF plots! Both the MTF curves and the optical scheme are completely superimposable!
Nikon didn't make any design change; moreover, the performance of the Z 70-180 with TCs is rather poor, as all tests clearly show.The Nikon branded lens likely uses slightly different coatings; this is irrelevant to the lens's performance; it may allow for similar color rendition to other Nikkor Z lenses (just).
Didn't I say that they may have the same optical formula but still different design.
The tamron design you linked clearly does not have clearance for TC, Nikon's does.
Do you have Nikon's 70-180 and a TC? I do and do I am speaking from experience. The lens is not the sharpest in its class (as 70-200mm) go. So adding 1.4x TC obviously degrades performance further but it is still very good, although not very useful (barely 250mm). 2x TC of course, like one would expect, yields pretty poor results. It is not even the sharpness but the fringing that bothers me.
Anyway, all this is to say that people who claim that nikon version is simply a rebadged tamron have mostly not handled/used both lenses, which I have (tamron E mount and nikkor).
Nov 07, 2025 at 05:16 AM
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