If a camera lens has the letters USM printed on it, it means UltraSonic Motor. This means that the motor is built into the body. These lenses tend to cost a little more than a lens without a USM.
There are various places where one could purchase a Sigma 70-300mm lens for a DSLR. For example, websites such as Amazon, SLR Gear and eBay all have them to purchase.
Yes. Make sure you purchase your sigma lens with the F-bayonet. Here is their lens finder: see related link
Someone looking to purchase a Sigma 1770 lens could purchase one from the Sigma website. They start at $499.00. If they were looking for a better deal the could purchase one from Amazon starting at $299.00.
Sigma builds lenses with mounts to fit Sigma and other cameras. I own two which are made to fit a Canon body. These would not work on a Sigma camera as they are, but I'm sure the lenses are also available with a Sigma compatible mount. This involves the type of locking ring as well as the location and number of electrical contacts for the motor. So when buying a lens, make sure it has the mounting configuration for the camera you own. The specs should say "for Sigma" or "Sigma mount", etc. I have tele-converters made by both Canon and Sigma. The mounts look the same, but if I recall correctly I can't use my Sigma converters with certain Canon lenses. In some cases, the equipment may fit, but the combination is not guaranteed to auto-focus. Or the focal length of the lens plus converter may be mis-reported in the EXIF information. Check compatibility tables. Without a converter you shouldn't run into many problems. But before investing a lot of money, It helps to locate a shop that carries the lens in question and try it on your camera.
Yes, the sigma is a good lens for the money. One cannot expect professional result with this chepo lens but for an enthusiast it will serve the purpose.
Canon EF lens mount was introduced in 1987. It is the standard lens for Canon EOS family of SLR films and digital cameras. The EF or Electronic Focus is handled by a dedicated electronic motor which is built into the lens.
The sigma 10-20mm EX DC HSM is a great wideangle lens with the Hyper sonic motor you need for Focusing and metering on the DX format. The Nikon 12-24 AF-s DX is quality too - but MUCH more expensive.
There are a number of online websites that sell sigma camera lenses. Sigma camera lenses can be purchased at Adorama, Best Buy, Bristol Cameras, Flip Kart, Amazon, Sigma Photo, Shopbot, Sigma Benelux and Price Panda.
Means Ultra-Sonic-Motor as referring to the auto-focus motor
^ I bought a lens of eBay from this website: ebay.com.au/itm/500mm-prime-telephoto-lens-for-Canon-Nikon-Sony-Sigma-Pentax-Sigma-DSLR-f8-/141387126153#rpdCntId Now I have a Sony a3500 and don't know all that much about photography. I can't find a review on it so can someone tell me at least a bit about it. Also, at the same time how far would a 500mm lens zoom and is f8 quick enough to take shots of surfers/cricketers
Basically most video cameras are fixed lens so you cannot put a camera lens in it unless it is specially built.