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<blockquote data-quote="photoguy54" data-source="post: 233745" data-attributes="member: 14417">Hello all! Need some help, here! I have a D5100 that was an upgrade from a D40. Love the camera but soon realized the kit glass wasn't gonna cut it for what I needed so I purchased an AF-S Nikkor 50mm 1:1.8G prime lens. Love it and get great results! Soon I realized I really needed a short telephoto for low light conditions for the many concerts I attend. I thought I had found the deal I was looking for (read small budget here) and settled on a Tokina AT-X Pro 28-70mm f/2.8 for a really good price. My research led me to understand, although now I'm not sure, it would function on the D5100 DX body. It arrived today and although used, it appears to be in excellent condition. It attached easily, turned on the camera and immediately have an error message that says &quot;Lock lens aperture ring at minimum aperture (largest f/-number.&quot;&nbsp; What does this mean and have I made an error with this lens? When I look through the view finder and depress the shutter button halfway I see f EE flashing and it will not release the shutter.What's happening here? I appreciate your responses!Photoguy54</blockquote>

[QUOTE="photoguy54, post: 233745, member: 14417"] Hello all! Need some help, here! I have a D5100 that was an upgrade from a D40. Love the camera but soon realized the kit glass wasn't gonna cut it for what I needed so I purchased an AF-S Nikkor 50mm 1:1.8G prime lens. Love it and get great results! Soon I realized I really needed a short telephoto for low light conditions for the many concerts I attend. I thought I had found the deal I was looking for (read small budget here) and settled on a Tokina AT-X Pro 28-70mm f/2.8 for a really good price. My research led me to understand, although now I'm not sure, it would function on the D5100 DX body. It arrived today and although used, it appears to be in excellent condition. It attached easily, turned on the camera and immediately have an error message that says "Lock lens aperture ring at minimum aperture (largest f/-number." What does this mean and have I made an error with this lens? When I look through the view finder and depress the shutter button halfway I see f EE flashing and it will not release the shutter. What's happening here? I appreciate your responses! Photoguy54 [/QUOTE]

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