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Cleaning the "Contacts"

Jim Mohundro

Seattle, US
450 posts

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Jim Mohundro Silver Member Nikonian since 23rd Jul 2008
Sat 25-Jan-14 10:19 PM

I purchased what appeared to be a very clean D300 (<10K actuations) with what seemed to have sufficient testing at the very reputable retail from where I made my purchase. I bought it as a DSLR backup to my D700 (battery the same, controls and menus very nearly the same), with the thought that I might eventually trade it, and, possibly, my D700 in on the D800, or, more likely, the D610. Frankly, as I age, I've become less and less comfortable hauling around either of my current Ds and, on two trips to Europe in the last three years, I've left my Nikons at home and traveled with the Panny GF1 and GX1; however, I still much prefer the Nikon DSLR look and feel and I hope I can find that in either the D800 or the D610, and all my lenses are FX in any case. Because I don't shoot sports or BIF, I'm not particulary conerned with the design of the autofocus sensor group and I'm beginning to think that I could be more than satisfied with the lighter weighted D610, and I used a D80 for more than three years so I'm not sure that I'd really worry too much about the D610's "only partial" alloy construction.

Now to what may or may not be a problem: I turned out to use the D300 very seldom after its initial testing and I find that autofocus (I use the AF-on back button) does not seem to consistently actuate. It may be good for half a dozen focus and shoots, then not focus in the next dozen tries, then regain its focus abilities, etc. In other words, focusing seems to unreliably off and on. I'm wondering if the D300 lens contacts need to be cleaned and how I should go about this and with what materials and devices; I suspect it is not quite as simple as using the eraser end of a pencil.

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