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Sigma 18-125mm f/3.5-5.6 DC

Sigma 18-125mm f/3.5-5.6 DC lens
Sigma 18-125mm f/3.5-5.6 DC 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.


No 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.


One or more 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.


Internal Focusing

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


The front lens is fixed

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.

This zoom lens was exclusively designed for digital SLR cameras featuring APS-C size image sensor and has a 6.9:1 zoom ratio. The image circle is designed to match the size of the image sensor of digital SLR cameras. From wide angle to telephoto, this new zoom lens can capture a wide range of subjects. As there is no need to change lenses, there is no risk of missing those great shots. This lens has a minimum focusing distance of 50cm (19.6in.) at all focal lengths and a maximum magnification of 1:5.3. A distance scale on the focus ring makes the lens convenient and easy to use.

Sigma 18-125mm f/3.5-5.6 DC Specification

Available mount(s) Canon EF, Nikon F, Pentax K, Sony / Minolta A, FourThirds, Sigma
Application(s) Portrait, Landscape, Architecture
Category(s) Standard zoom, Tele zoom
Multiplier 1.5×
Stabilizer no
Focal length 18 - 125 mm (6.9× zoom)
Lens construction 15 elements in 14 groups
Angle of view 35mm: N/A
digital: 69.3-11.4°
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 50 cm
Magnification 0.19×
Filter size 62 mm
Size ∅ 70 × 77.7 mm
Weight 385 g
AF speed N/A
AF sound
Internal focusing yes
Internal zoom N/A
Fix front lens yes
Mount type metal
Weather sealed N/A
Drop in filter no
Ultrasonic AF no
Stepping motor AF no
APS-C sized circle yes
Low dispersion lens element yes
Hard case N/A
Soft case N/A
Lens hood LH680-01
printable lens hood
Tripod adapter N/A
Discontinued yes
Sigma 18-125mm f/3.5-5.6 DC Specification

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