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

Started Jul 12, 2012 | Discussions thread
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Re: Tamron 01F aperture readout
In reply to Rich O, Sep 1, 2013

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.

Noted, thanks for the explanation so I decided not to sell any

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