70-300 Tamron sharpness

Started Jul 25, 2012 | Discussions thread
Regular MemberPosts: 253
Re: 70-300 Tamron sharpness
In reply to jonikon, Jul 26, 2012

Yes, that is true. However I found the pictures on the web which looked much better. It seems to me that my copy is indeed not the best one. It is pity because the lens is fast and stabilization works perfectly.

jonikon wrote:

The SLRgear.com review of this Tamron 70-300 VC shows that this lens is quite sharp at the wide end and soft at 300mm, especially at f5.6.

I have found that a lens must show no more than 1 blur unit in most of the frame for it to appear "tack sharp. 2 blur units is acceptably sharp, but 3 blur units or more is starting to get noticeably and disappointingly soft. Stopping the lens down almost always helps sharpness and CA though, but this has it's limits..

As you can see with this graph, the Nikon 70-300mm f/4.5-5.6G IF-ED AF-S VR Nikkor is a better performer than the Tamron at the long end, and generally has a more even optical performance overall.

We would all like to believe that one can get the sharpness and optical qualities of a $1500 lens for sub $500 price, but that's not going to happen. The reality is that you get something less with these cheaper consumer lenses. They can be a disappointment, or more rarely, a pleasant surprise, depending on the particular copy you happen to get. In the OPs case, I suspect his lens is not one of the better copies of the Tamron 70-300 VC.

  • Jon

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