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Thanks for the link Marios, and I agree with that sentiment, as well as Peter's comment regards the f-stop.
In fact I think I will test that as well to get a definitive answer to where the sweet spot is in this lens. I have known for decades that the extremes of aperture were never going to give the results I would like, and that zooms especially have sweet spots in the zoom range. Inevitable given the compromises made in the optical configurations throughout the zoom.
I have hardly used it so don't have a complete familiarity with it's performance so, I think a few more tests to cover aperture and focal length are probably a quick way to acquire the knowledge.
Thanks for your comments folks.
Trev
Some samples of the lens used at close range. This seems to be where it excels.
1. The Heron at 300mm f10 ISO200 at about 10mtres, and cropped from the centre of the image (about 25% of the total area, and resized to 1200px for upload)
2. Night Heron 300mm f9 ISO400 from 10mtres and a crop of the centre of the original representing about 25% of the total image size, then resized to 1200px
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