Attention Tamron 24-70 VC owners

Started Jul 28, 2012 | Discussions thread
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Horshack OP Veteran Member • Posts: 5,803
Thanks. Appears your copy has the issue as well

TAFB wrote:

FWIW:

Provided that your two images were shot with the same LVs (ambient light levels) and shutter speed as indicated, the f/4 image should be 1/2 as bright as your f/2.8 image but it appears they have nearly identical brightness, which means the lens did not properly stop down to f/4.

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