Tamy 18-270 on T2i ... any actual users ?

Started Dec 9, 2010 | Discussions thread
Henry Richardson Forum Pro • Posts: 15,368
Tamron 18-270mm VC

PhillipA wrote:

... no guarantee that the new one will be better (or even as good) optically as the current version. As it has less elements and is smaller and lighter, it may have been made down to a price, rather than actually be an optical improvement.
We will have to wait for reviews I guess.

The new Tamron 18-270mm VC looks interesting and I am looking forward to seeing what reviews say. The new Tamron takes a 62mm filter and the old/current Tamron takes a 72mm filter.

I suspect that the new Tamron will vignette a bit more than the old version. Also, the aperture will probably decrease more rapidly as you zoom. I also have the Sony 18-250mm f3.5-6.3 and it has a 62mm filter. Basically it is a rebadged Tamron 18-250mm with a few improvements -- faster AF, rounded aperture blades, maybe better lens coatings, and the outside is the Sony style. I mounted my Tamron 18-270mm on my Canon 60D and slowly zoomed and watched as the aperture decreased as the focal length got longer:

Tamron 18-270mm old
18mm f3.5
28mm f4
40mm f4.5
60mm f5
100 f5.6
220mm f6.3

I mounted my Sony 18-250mm on my A700 and did the same:

Sony 18-250mm
18mm f3.5
22mm f4
35mm f4.5
50mm f5
70mm f5.6
150mm f6.3

Maybe the new Tamron 18-270mm will be more like the Sony/Tamron 18-250mm than the old Tamron 18-270mm, but we must wait for reviews and user reports to know.

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Henry Richardson

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