
November 26th, 2012, 06:39 AM
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I've recently bought one to replace my 45-200 when weight is at a premium. It seems slightly sharper at 45mm and the tiniest amount (I couldn't really swear there's a difference) softer at 150mm. Colour/contrast is similar between the 2 lenses.
I did notice a small issue, however, and you can't really blame the lens. I initially thought the lens was soft, but I finally worked out that it's just really difficult to hold steady, due to the light weight! The 45-200 is easier because it's heavier. Even with the image stabiliser, which takes a second or two to kick in properly, I was seeing results similar to what I'd get with a full size DSLR at an equivalent focal length, without an image stabiliser.
As an aside, I tried some shots with a Canon 70-200mm f/4L IS (one of the best zooms in existence) on my G5. While they were sharper and had more contrast, the difference was very small indeed, which is a great result :) (I also tried a cheap Canon zoom, and that was clearly inferior).
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