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D300 Won't Focus with Sigma 120-300 OS

Bob Chadwick

Norcross, US
2337 posts

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Bob Chadwick Silver Member Nikonian since 12th Jan 2006
Sun 27-Jan-13 03:43 AM

I bought the Sigma 120-300 OS last September to use for night football with my D800. It has worked like a champ.

I went to shoot some flag football this afternoon in bright sunlight and decided to take the higher FPS D300. I got to the game and no matter what I did it wouldn't autofocus. The lens is in auto mode, the switch on the camera body was placed in the single and continuous mode and the menu selection is set to focus when the shutter button is depressed. I fiddled with all kinds of combinations.

I came home and Sigma works perfectly on the D800 and a 24-70 works perfectly on the D300.

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