Bird ident?

Not a good shot but an interesting colour scheme.

Its a Pied Wagtail Hugh.

Brilliant, thanks for that

Never heard of a bird called Hugh

Odd looking motion blur in the OOF background but nowhere else ? ? ?

Could it be moire? The bokeh off the DA*300mm is usually excellent
I've never seen anything like that from a K-5 Mk1. This shots from a K-3.
1/800th I seem to remember is around the limit for the filter.

Click through for the 1123w shot.

The rest of the shot is excellent.
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I was shooting with a cheap Kood uv filter on, it might be some small defects in the glass. IT served it's purpose yesterday, while packing up the wind caught the benbo tripod and blew it over onto the stones, k3, DA*300 and all. Luckily the filter rim and tripod adjustment bolt took the worst of it with only a tiny mark on the lens barrel. Everything seems to be working well but I'm heading out again today to test it properly.

Pretty sure I've got all filters and anti shake switched off.

Hopefully it was caused by the filter.

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I've gone over some of the other images from yesterday and it's visible in them too, I think it's the double glazing effect. A reflection off the front element onto the rear of the filter and back down the lens, slightly off line.