Customer Reviews

Sigma 100-300mm f/4 EX DG IF HSM APO Fast Aperture Telephoto Zoom Lens for Nikon Digital SLR Cameras

5 star:		(2)
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This lens is the third Sigma lens I have purchased for my Sony A100 digital SLR. The lens is very well constructed. The mount is all metal. Auto focus is quick and accurate. I especially like the fact that all movement is internal. At 3 pounds, this is not a lightweight lens but it does not change length when zooming or focusing. This keeps the system very well balanced. The tripod mount is somewhat small compared to the Sigma 50-500 zoom but it secures the lens very well. Image sharpness at the minimum focusing distance of 71 inches is excellent. Image sharpness on distance shots at f4 is not good but improves at f5.6 and is very good at f8 thru f16.
I also own the Sigma 50-500mm f4-6.3 EX DG autofocus zoom lens. The image quality of the 100-300 zoom is better at all focal lengths than the 50-500 zoom. Image quality with the 50-500 zoom is best at 300mm but the 100-300 zoom is better.

I can only add my unreserved enthusiasm for this lens to the technical reviews out there. I had one off ebay, rarely used it and sold it when strapped for cash, but then spent months craving it back. Finally a wonderful person in my life bought me a new one from Amazon and since when I've taken hundreds of sporting and street journalism images.
It handles and balances really well on my Nikon D2X, has solid zoom ring in a great position, smooth movement of manual focus override if needed, near silent use, non-rotating and non-extruding front element, removable tripod clamp. It feels like its hewn from solid volcanic rock and glass -in stark contrast to the Nikon 18-200mm which has essentially and almost literally fallen apart after 3 years. The long end of this is so much sharper, brighter to compose, and richer in quality (as well as longer in telephoto) than the Nikon. The wide end of that will soon be replaced by a 16-85mm. Highly recommended, and can't find the slightest niggle to complain about.