d7100, the smaller birds in flight.
Also, I am seeing lots of noise in the sky at 100% crop, even down at ISO 320. I am shooting raw and then doing noise reduction after processing so it ends up looking pretty clean. My main drawback is the softness of my lens at 300mm and f5.6.
I am seeing quite a bit of noise in your photos as well, granted at ISO 1000. Did your photos have any noise reduction?
These are very small crops, and I think that is the reason you are seeing noise even after I applied some luma NR in Lightroom. It is very fine grained noise, which probably would not show on a print.
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