Out of Las Vegas come a clutch of new lenses from Sigma. The best thing about Sigma lenses is that they can be bought to fit most of the major camera brands, unlike offerings from the camera makers themselves which are a lot less promiscuous.
The standout glass from Sigma comes in the form of two fixed maximum aperture lenses. These keep the same lens opening size throughout the zoom range instead of getting dimmer the farther you zoom. We have a 10-20mm F3.5 EX DC HSM and a 24-70mm ƒ2.8 IF EX DG HSM. Allow me to translate.
OS means "Optical Stabilizer", which stops your shots from blurring even with the morning hangover shakes. EX doesn’t stand for anything. It is Sigma’s badge for its better made lenses and probably meant to evoke the word "excellent". HSM means "Hyper-Sonic Motor", the fast, internal motors which drive the autofocus. Finally, DG is Sigma’s designation for full frame and 35mm film cameras, known as FX elsewhere, and DC lenses are made for cropped-sensor cameras. Phew!
There are also a few new variable aperture lenses — an 18-250mm ƒ3.5-6.3 OS, an 18-50mm ƒ2.8-4.5 DC OS HSM and a 50-200mm ƒ4-5.6 DC OS HSM. They are slowly popping up on Sigma’s site, but are as yet unencumbered with prices.
Lens page [Sigma]
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