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- SLR Lenses > Lens by brand > Sigma Lenses
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Sigma Lens 28mm f/1.8 EX DG ASP Macro - Pentax Mount
The large aperture wide-angle lens for digital and 35mm film SLR cameras. This lens has a macro focusing capability with fast F1.8 maximum aperture, which is ideal for Digital SLR cameras.
What’s in the box?
Sigma Lens 28mm f/1.8 EX DG ASP Macro
Front Lens Cap
Rear Lens Cap
Lens Case
Lens Hood LH825-03
Instruction Manual
12 month warranty from CR Kennedy. |
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Compatible Accessories
Specifications
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Lens Construction |
10 Elements in 9 Groups |
| Angle of View |
75.4 degrees |
| Number of Diaphragm Blades |
9 Blades |
| Minimum Aperture |
F22 |
| Minimum Focusing Distance |
20cm/7.9 in. |
| Maximum Magnification |
1:2.9 |
| Filter Size |
Diameter 77mm |
| Dimensions |
Diameter 83.6mm X Length 82.5mm
3.3 in. X 3.2 in. |
| Weight |
500g/17.6 oz. |
Macro capability
This lens is capable of Macro photography, with minimum shooting distance of 20cm (7.8 inch) (reproduction ratio 1 : 2.9) and angle of view is 75.4. You can take picture not only the subject but also the surrounding scenery.
Large front element and Super wide-angle
The lens has an advanced optical construction, in order to obtain adequate peripheral brightness with open aperture. Also, the iris diaphragm has 9 diaphragm blades to obtain beautiful out of focus images in the foreground and background.
Handling
The lens incorporates a Dual-Focus (DF) mechanism. It is easy to hold the lens, since the focusing ring does not rotate during auto-focus, yet it provides adequate focusing torque of the focusing ring during manual focusing of the lens. Also, this also allows the use of a Petal-type Hood and the easy use of a polarizing filter.
Aspherical lens
It incorporates a floating focus system and uses two aspherical lens elements for minimizing distortion, aberration and astigmatism
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Digital Camera
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