Welcome to Nikonians! Sorry to hear of your problem. Is the lens fully seated and locked in the mount? Check the AF mode set in the camera body and verify that it is in AF mode. Set the AF Area mode to Single Point. Then use a good AF target 10 or more feet away from you and give it a try. Good luck and Enjoy your Nikons!
>I noticed the protruding level from her kit lens moved, which >I assumed connected to the body's CPU for the auto-focus.
The lever that projects out of the back of the lens is the aperture stop down mechanism.
>The little lever on the new lens was not moving. I realize I >shouldn't have tried this, but I pulled just a bit and freed >it from being stuck.
If the aperture was stuck in the closed position, the viewfinder should be very dark. The Aperture diaphragm should only be stopped down when the DOF preview button is pressed (D3100 doesn't have one) or the shutter is open.
If it gets jammed again, you might want to return the lens to the retailer for exchange or send it to Nikon Service for repair. Good Luck and Enjoy your Nikons!
If the auto focus works with both the 18-55 and the 55-200 Kit lens. And, the 55-300 is properly seated until you hear a click and it locks in place. I'd say you have a Bad 55-300 lens and need to be returned to the dealer.
Also, is the 55-300 the same type DX VR lens as the 55-200? If it's not, then you have purchased the wrong type. You would need to return and get the exact same type as the 18-55 and th 55-200, except in the 55-300 version.
Something is definitely wrong because I bought a 55-300 for my D3000 around black friday and it has been working perfectly since then. Should work absolutely fine with no problems. Don't forget though, unlike the kit lens, you need to be at least 4.5 feet away from your subject or it will not focus. -Maureen
>Hi, > >I'm new to this and I have the same problem with the >Autofocus. I'm using few different AF-S Lens with the same >result. > >It seem the that the focus motor always stop at the end of the >run (Infinity) and cannot locked on the target, thus cannot >release the shutter. This only happen when I use the View >Finder > >But the AF motor works fine and can focus on the target if I >use the LIVE VIEW (LCD). > >I tried the single point auto-focus, and I tried cleaning the >contact but still cannot get the AF to focus on the target >thru view finder. > >Any suggestions? > >Thanks. > >Qaz
You may be too close to your subject. That is the main reason AF won't work. Other reasons are low light, or a moving subject.
working on it in Middle TN Nikon D3100
35 mm 1.8 Nikkor 18-55 mm Nikkor VR 55-200 mm Nikkor VR 55-300 mm Nikkor VR 150-500 mm Sigma OS Feisol CT3471 & Markins M20 ballhead