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7100, 300 f/4 and 1.4x Focussing Issue

brada

US
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brada Silver Member Nikonian since 29th Jan 2008
Fri 18-Apr-14 02:47 PM

I have a D7100 and D300, 300 f/4 and the current 1.4x.
I am having repeated issues with the D7100, 300, 1.4x and focussing. It will work for a while, stop focussing and start working again. If I cleaned the contacts, this would clear up the problem for a a little while. It would work for a couple of months between cleanings, then less and recently only a 1 week ( roughly 2000 shots) before it stopped focussing entirely. Right after not working on D7100, connected to my D300 it worked fine with no issues. If I take off the 1.4, the D7100 and 300 f/4 works flawlessly.

Do you think this is a 1.4x or D7100 issue?

Thank you,
Brad

http://www.bradaphotography.com
my Nikonians gallery.

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