My 300mm 2.8 vrii not sharp, or is it me?

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sean4646 New Member • Posts: 6
My 300mm 2.8 vrii not sharp, or is it me?
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Hi all, very recently got a 300mm 2.8 second hand off ebay.

sometimes I think its sharp and other times I don't.

I took this photo yesterday. Could I have your opinion please? I cant help thinking the beak is not sharp.

I think it may be back focusing?

I went into an empty work at weekend and calibrated my lens, it wasnt until I got home I realised I calibrated at f5 instead of wide open.

would that make a huge difference?

Sean

this was shot at f5.6 1/1000sec

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