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Tsuioku - APERTURE RING is NOT the same as FOCUS RING!: Sony Alpha / NEX E-mount (APS-C) Talk Forum: Digital Photography Review
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What is “A” on this lens's aperture ring? You need to push a button to lock in into place. Pentax k1000 with smc Pentax-A 50mm f/2.8 : r/AnalogCommunity
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how to tell if the aperture ring is working on a manual lens?: Micro Four Thirds Talk Forum: Digital Photography Review
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