Tamron "Legacy" SP 90mm f/2.5 Macro Is A Winner!

Started Jul 12, 2012 | Discussions thread
Rich O Regular Member • Posts: 421
Re: Tamron 01F aperture readout

The second 01F won't show the effective aperture because its not coupled to the aperture ring like the first 01F.   The first 01F correctly shows f/5 , which is 2x f/2.5.  You'll just have to remember that your shooting at 4x from whatever aperture you select on the lens itself.

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