Reviews and Problems with Sigma 105mm F2.8 EX DG OS HSM Macro
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Excellent lens but super heavy!
2 July 2012
Summary: This lens could never be considered to be poorly built. It is built like a tank! It's a very heavy piece of glass and gives excellent sharp photos with nice boke. I would highly recommend this lens to anyone looking for a 1 to 1 macro / portrait lens. Pros: Heavy well built, Sharp, Nice Boke, useable on both DX & FX cameras. Cons: Autofocus HUNTS viciously in lower light, Heavy! a pain to carry around, Lens cap doesn't fit real well.
Summary: Picture quality is good>great. 2 negative points: 1. Not weather sealed, I knew this before I bought it but for a f/2.8 Pro-consumer lens would be nice. 2. The big thing that lets this lens down is its autofocus (which may or may not be a problem for your macro work.) I have couple of Nikon D lenses with focus screws that can focus faster. My Sigma 105mm f/2.8 OS HSM Macro lens seems to spend to long hunting, and more than often cannot find focus.
Summary: Use this for bugs and anything I want to see close up. Is really nice piece of kit but is heavy (which makes it good) and sometimes I turn off the autofocus as it gets a bit confused but most lenses would be the same. Is also good for general landscape or portrait but with no zoom can be limiting depending on what you want.
Pros: Consistent Output, Durable, Easily Interchangeable, Sharp Focus, Strong Construction
Summary: This lens has fantastic image quality, and is built very well. Its an f2.8 lens that can focus at 1:1. A couple of things are not so great. Firstly the OS is very noisy, as is the AF. In low light, the AF is fairly inaccurate, and hunts a lot, even with the appropriate AF limit switch engaged. The AF is also slow compared to pro nikon glass. But at the end of the day, its not a pro lens, and its cheaper than Nikon, so a few compromises are to be expected.