Sony 18-55mm f3.5-5.6 vs Tamron 17-50 f2.8

Started May 16, 2012 | Discussions thread
Ralf B
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Re: Sony 18-55mm f3.5-5.6 vs Tamron 17-50 f2.8
In reply to dandoro, May 16, 2012

dandoro wrote:

I was thinking to upgrade my kit lens with the most praised Tamron 17-50mm lens. The technical reviews are here:

http://www.photozone.de/sony-alpha-aps-c-lens-tests/573-sony1855f3556?start=1

http://www.photozone.de/Reviews/289-tamron-af-17-50mm-f28-sp-xr-di-ii-ld-aspherical-if-canon-test-report--review?start=1

First things first, take the Tamron test at Photozone in A-Mount, to make the sharpness comparison valid:

http://www.photozone.de/sony-alpha-aps-c-lens-tests/386-tamron_1750_28_sony?start=1

As you can see, I could say the Sony 18-55m kit lens is sharper than the Tamron,

wrong, the Tamron has higher resolution than the kit. Forget the resolution figures you linked to, the Canon APS-C tests at PZ all have a different res figure scale

at vignetting both are quite the same,

Which is an achievement for a 2.8 zoom

at distortion Tamron is better, while at chromatic aberrations Sony seems to be better. Add to all this, the fact that the Sony kit lens combined with a SLT body can function with the autocorrection in-body Sony software which automatically corrects distortions, vignetting and CA, while Tamron is not compatible with this software. So, beside the almost one stop advantage,

make that two stops at the 50mm end where the kit is 5.6

can anyone find for me any advantage of the Tamron lens over the Sony lens? Why should I upgrade it? Only for that f2.8?

Well, sharper, as should be clear now, and more contrasty, almost, if not even on the level of the famed CZ 16-80, and much faster at the tele end which even allows for shallow DOF portrait shots.

No kit lens bashing intended here, as the SAM 18-55 is really good for what it is. Only correcting the wrong conclusions drawn from looking at the Canon mount test of the Tammy.
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Cheers,
Ralf

 Ralf B's gear list:Ralf B's gear list
Sony Alpha DSLR-A900 Sony Alpha DSLR-A700 Sony SLT-A55 Sony 16-35mm F2.8 ZA SSM Carl Zeiss Vario-Sonnar T* Sony 24-70mm F2.8 ZA SSM Carl Zeiss Vario-Sonnar T* +12 more
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