Sigma's new 1750mm F28 EX DC OS HSM largeaperture standard zoom lens covers a focal length from 17mm wide angle and offers a large aperture of F28 throughout the entire zoom range, making it ideal for many types of photography especially portraiture and landscapesI recently picked up Sigma's 1750mm F28 EX DC OS HSM lens (from herein referred to as Sigma 1750mm) as I had a need for fast lens covering the standard zoom range With a few weddings ahead of me I thought this would be a good lens to have in my kit, and it fit my budget, coming in at right around $500 USDThe 1750mm f/28 EX DC HSM OS features the slightly simplified version of Sigma's HSM ("hypersonic AF motor") It is still fast and nearly silent but fulltime manual (FTM) override is not possible in singleshot AF mode Still, thanks to HSM the lens is fully compatible with all Nikon DSLRs, including the entrylevel models Sigma Zoom 17 50mm 1 2 8 Ex Dc Os Hsm Review Happy Sigma 17-50mm f2.8 ex dc os hsm len...