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Title: Less than satisfactory
Review: I am very disappointed with the performance of this lens. I expected better from Canon since I am a long-time Canon user and have many lenses by them. Images are soft to semi-sharp at all focal lengths. 300mm is never sharp. When enlarged even 25% all images go very soft and become noisy and would be useless for printing. I get much better results with all my other Canon lenses. For the price of this lens I expected much better. My son has a cheaper canon telephoto and gets better images. Looking at the reviews others have written on Amazon, it may be that this particular lens has an inherent optics flaw. The IS works fine in both settings, but the images are still not crisp.
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