« on: Today at 03:18:57 AM »
I occasionally see raptors flying high, usually too high for photos. I took the kestrel (middle) and buzzard (bottom) last weekend and the marsh harrier (top) last December. They are all 100% crops, with the birds occupying only 400-500x600-700 pixels, which gives an idea of how far away they were. All are hand-held using the 5DIII + f/2.8 300mm II + 2x TC III at f/5.6. 600mm and iso 640. (I saw them while walking around and could not have used a tripod).
The kestrel looks the best of this group of images, in my opinion. Did you set ISO to 640, or was it in auto ISO?
ISO 640 was set manually. It is my default setting for reasonable light as I find the noise level acceptable and very well suppressed with DxO prime. So, I use AV, with f = 5.6, ISO 640 and let the camera take care of the speed for shots like these. Also spot metering + 2 ev to get the right exposure against the sky. Focal gives f/5.6 as the sharpest aperture for my lens at 600mm.
I agree the kestrel is the best. The buzzard is of very marginal quality as it was just a dot in the sky and I photoed it just for identification. In extreme situations such as these the Canon 300 II + 2xTC III combo has a real edge over the Tamron 150-600mm, though for closer situations the Tamron is nearly as good at f/8.