Black Frames?

Dec 11, 2007
Janesville, WI
I was shooting a game last Saturday night, and my D300 was rifling off sequences of black frames here and again.
Now, I know that the D300's collar, for some reason, has a certain amount of play with my 70-200mm, something that other Cafe'ers have confirmed with their bodies.
I know that if I swivel my camera into the vertical position, thereby 'tweaking' the lens' position, it will--sometimes--refuses to focus. It is easily corrected by shifting the lens via this play.

It's weird, I know, and I plan on sending it to Nikon when the season is over to see if it can be fixed, but I'm wondering if this is the cause for these mysterious 'black' frames?
Jan 26, 2005
Haverhill, MA
The Mysetrious Black Frames

Are simply caused by inadequate communication with the lens.

It is an electrical contact issue that can be cause by a mechaical coupling issue or a dirty contqact issue.

In addition, some 70-200's have an inherent ground issue internally and Nikon modifies these by adding an internal ground wire in the lens body.


Surely if the lens doesn't stop down because of a failure to communicate the frame should be a blown white not a 'shutter refused to open' black ?

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