|DC||The lens is designed only for APS-C digital cameras.|
|OS||The lens is equipped with optical image stabilizer. The stabilizer allows to increase the shutter speed by several stops and shoot handheld in such lighting conditions and at such focal lengths where without stabilizer you will have to use tripod, decrease the shutter speed and/or increase the ISO setting which can lead to blurry and noisy images.
Sigma lenses for Olympus, Pentax and Sony digital SLR cameras are not equipped with optical image stabilizers because these cameras have built-in sensor-shift image stabilization technology.
|HSM||The lens is equipped with ultrasonic motor to provide very fast and virtually silent autofocus. Learn more|
|MACRO||A lens with better close-up focusing capabilities in comparison with traditional lenses. Not a macro lens though.|
|Position in the lineup|
|Sigma 18-250mm F/3.5-6.3 DC Macro OS HSM||Jun 2012||⊗|
|Sigma 18-250mm F/3.5-6.3 DC OS HSM||Jan 2009||⊗|
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|Diagonal angle of view:||74.1°-6.2° (Canon APS-C)
|76.3°-6.5° (Sony APS-C)
|76.3°-6.5° (Nikon APS-C)
|76.3°-6.5° (Pentax APS-C)
|69.2°-5.7° (Sigma APS-C)
|Lens construction:||16 elements in 13 groups, including:|
|Number of blades:||7|
|Closest focusing distance:||35 cm|
|Type of autofocus motor:||Ultrasonic (Canon EF)|
|Ultrasonic (Minolta/Sony A)|
|Ultrasonic (Nikon F)|
|Ultrasonic (Pentax K)|
|Ultrasonic (Sigma SA)|
|Full-Time Manual Focus:||No|
|Image stabilizer:||Canon EF|
|Stabilizer features:||Mode 1|
|Stabilizer efficiency:||up to 4 stops|
|Weight:||SA: 470 g|
|Maximum diameter x Length:||SA: Ø73.5 x 88.6 mm|
|Filter size:||62 mm|
Design and Features
The lens barrel is of moderate weight, made of plastic. The lens mount is metallic.
The lens has a very wide focal range. Formally it is the advantage, however in practice it causes certain problems with compensation of optical aberrations and equally high image quality at the entire focal range.
The lens features a zoom lock lever to keep the zoom ring fixed at the shortest focal length of 18 mm. This function is convenient for carrying a camera with the lens on a strap because it prevents the lens from extending.
The lens features AF/M focus mode switch.
|AF||Autofocus mode without Full-Time Manual Focus.|
|M||Manual focus mode.|
The lens uses front filters with standard size of 62 mm which are easy to find. They are also inexpensive.
The filter thread does not rotate during focusing which allows convenient use of different types of filters (including but not limited to polarizing and gradient).
Versions of the lens for Canon EF, Nikon F и Sigma SA mounts feature optical image stabilizer, which, according to the manufacturer, compensates up to 4 stops of shutter speed. Theoretically it allows to capture sharp images of static subjects at shutter speeds down to 1/16 second at focal length of 250 mm(*).
* without the need to increase ISO sensitivity and/or use a tripod, at the same lighting conditions and at the same aperture
The image stabilizer does not have any specialized mode of operation and is not capable of automatic detection of panning.
|User Manual. Multilingual, Adobe PDF, 2 MB|
|Prime lenses for Canon EOS DSLR cameras|
|Pentax lenses: compendium|