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Description
Pushing It.I recently bought a new lens: the Canon Zoom EF 100-400 mm 1:4.5-5.6 L IS II USM. This is the Mark II version of my previous long zoom that I have used for wildlife work. While in Scotland recently, I gave it a test on a dismal, grey day at the Ken Dee Marshes, an RSPB reserve on the banks of Loch Ken in Dumfries and Galloway. I had preset the camera for bird photography with a Tv of 1/1000th second, a floating ISO that turned out to be 6400, and the widest aperture on the lens. The high ISO is a giveaway that the light was very poor and that I was pushing my luck to take anything half-way decent. However, this was a test run to see how the lens fared in adverse conditions. As it turned out, I was remarkably lucky in what I saw and captured even though the quality of the images certainly suffered from the poor light and high ISO.
As I slowly made my way along the track I saw movement in the far distance and a few seconds later a stoat in its winter coat came running towards me. T

Description
Pushing It.I recently bought a new lens: the Canon Zoom EF 100-400 mm 1:4.5-5.6 L IS II USM. This is the Mark II version of my previous long zoom that I have used for wildlife work. While in Scotland recently, I gave it a test on a dismal, grey day at the Ken Dee Marshes, an RSPB reserve on the banks of Loch Ken in Dumfries and Galloway. I had preset the camera for bird photography with a Tv of 1/1000th second, a floating ISO that turned out to be 6400, and the widest aperture on the lens. The high ISO is a giveaway that the light was very poor and that I was pushing my luck to take anything half-way decent. However, this was a test run to see how the lens fared in adverse conditions. As it turned out, I was remarkably lucky in what I saw and captured even though the quality of the images certainly suffered from the poor light and high ISO.
As I slowly made my way along the track I saw movement in the far distance and a few seconds later a stoat in its winter coat came running towards me. T