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The Tokina ATX-Pro 28-70mm Confusion
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<blockquote data-quote="Bikerbrent" data-source="post: 692264" data-attributes="member: 42081"><p>Are you referring to a black tab to the right of the F-stop rings? If so, this is a locking device for the F-stop. When the lab is pushed upward (towards front of lens), the F-stop ring will move freely. However, if you set the F-stop ring to F22 (green mark), then slide the tab downward (exposing a green mark) then the F-stop will be locked at F22 for autofocus. Returning this tab to the upward position unlocks the F-stop ring. This tab may have been forced downward when the F-stop ring was not at F22, causing the issue you noted. At least this is the way in works on my Gen 2 lens. Congratulations, this is one great lens.</p></blockquote><p></p>
[QUOTE="Bikerbrent, post: 692264, member: 42081"] Are you referring to a black tab to the right of the F-stop rings? If so, this is a locking device for the F-stop. When the lab is pushed upward (towards front of lens), the F-stop ring will move freely. However, if you set the F-stop ring to F22 (green mark), then slide the tab downward (exposing a green mark) then the F-stop will be locked at F22 for autofocus. Returning this tab to the upward position unlocks the F-stop ring. This tab may have been forced downward when the F-stop ring was not at F22, causing the issue you noted. At least this is the way in works on my Gen 2 lens. Congratulations, this is one great lens. [/QUOTE]
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The Tokina ATX-Pro 28-70mm Confusion
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