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Sigma 18-50mm f/3.5-5.6 DC HSM

Sigma 18-50mm f/3.5-5.6 DC HSM lens

APS-C sized image

Lenses that create APS-C sized image are designed for digital only. They cannot be used on cameras that have image sensor larger than the APS-C format. These lenses are not suitable for film cameras either.


Ultrasonic AF

Lenses with ultrasonic focusing mechanism tend to be quiter and faster than traditionally focusing lenses.


No stepping motor AF

Lenses with stepping motor focusing mechanism are better for contrast based focusing, and are quiter and faster than traditionally focusing lenses.


No Low Dispersion lens element is used

Low Dispersion lens elements help to reduce chromatic aberration.


Not stabilized

Image stabilization helps to reduce blur caused by hand shake, especially at high focal length or in low light situations. Image stabilization can give 1 to 3 stop advantage over none stabilized lens, based on the reciprocal rule.


Metal mount

Cheaper lenses are usually equipped with plastic mount, while more expensive, professional lenses have metal mount. In general, metal mounts are more durable, and a good thing to have when lenses are changed a lot. When a camera is used mainly with one lens, the material of the lens mount is not that important.


No Internal Focusing

Internally focusing lenses don't change their size while setting focus.


The front lens is rotating

The fixed front lens is not rotating during zoom and/or focusing. This allows the photographer to use petal shaped lens hood. Fixed front lenses also make the use of polarization filters a lot easier.


No drop-in filter support

Drop-in filters are used in those lenses where either the front lens is too large, or the field of view doesn't permit the use of traditional filters at the front of the lens. Usually bright tele and ultra-wide angle lenses support this filter type.

Compact-Lightweight zoom lens has a maximum diameter of 62mm (2.4in.), overall length of 67.5mm (2.6in.) and weight of only 250gr (8.7 ounces) and filter size of 58mm. Compact dimensions offers superb handling and mobility. The use of aspherical lenses provides correction for various aberrations throughout the entire zoom range and produce high level of optical performance.

Sigma 18-50mm f/3.5-5.6 DC HSM Specification

Available mount(s) Canon EF, Nikon F, Pentax K, Sigma
Application(s) Portrait, Closeup, Landscape, Architecture
Category(s) Standard zoom
Multiplier 1.5×
Stabilizer no
Focal length 18 - 50 mm (2.8× zoom)
Lens construction 8 elements in 8 groups
Angle of view 35mm: N/A
digital: 69.3-27.9°
Number of blades 7
Maximum aperture wide: f/3.5 tele: f/5.6
Minimum aperture wide: f/22 tele: N/A
Minimum focusing distance 25 cm
Magnification 0.29×
Filter size 58 mm
Size ∅ 69.6 × 60 mm
Weight 250 g
AF speed N/A
AF sound
Internal focusing no
Internal zoom N/A
Fix front lens no
Mount type metal
Weather sealed N/A
Drop in filter no
Ultrasonic AF yes
Stepping motor AF no
APS-C sized circle yes
Low dispersion lens element no
Hard case N/A
Soft case N/A
Lens hood LH730-02
printable lens hood
Tripod adapter N/A
Discontinued yes
Sigma 18-50mm f/3.5-5.6 DC HSM Specification

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58 mm Filters

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