Sigma 28MM F1.8 EX ASP Macro F Pentax

Sigma
Product #:
SGL440109
Manufacturer #:
440109

- Designed for use with full frame digital SLR cameras
- Two Aspherical glass elements offer correction for distortion
- Capable of Macro photography
- Floating optic focusing system
- Non-rotating front lens makes it suitable for a petal-type hood & polarizing filters

Lens Type:
Prime
Lens Type:
This is the type of lens.
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Our Price: $449.00

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Overview

Overview

For many photographers, the Sigma 28mm focal length is the ideal general purpose wide angle lens. Its wide enough for most scenic and landscape assignments and when used indoors for building interiors or groups of people, its wide angle effect is not as extreme as with shorter focal length lenses. A forgiving wide angle lens for newcomers to wide angle photography and highly effective for professionals with its EX construction and fast 1.8 aperture. This high speed performance is excellent for photojournalists doing low-light documentary photography and its use of two aspherical lens elements assures excellent optical performance.

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Specifications

Brand
Sigma - Sigma
Physical Specifications
Length: 3.1"" (7.87 cm)
Length:
The measurement of something from end to end.

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Weight: 1.06 lb (480 g)
Weight:
The physical weight of the item without packaging.

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Color: Black
Color:
The color of the item.

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Brand
Brand: Sigma
Lens Specs
Lens Min. Focus Distance: 7.9"" (20.07 cm)
Lens Min. Focus Distance:
The shortest distance that a lens can focus.

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Lens Filter Size: 77 mm
Lens Filter Size:
The size of the filter that fits the lens.

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Minimum Aperture: f/22
Minimum Aperture:
How wide a lens can be opened.

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Lens Magnification Factor: No
Lens Magnification Factor:
This is the magnifying factor of a lens. Macro lenses will often be described by their “magnification factor”. A lens with a 1:1 magnification factor produces a projected image on the sensor which is the same as the subject.

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Elements / Groups: 10 Elements in 9 Groups
Elements / Groups:
The individual pieces of glass that form the overall optical construction. Most lenses have between four and eleven elements to bend the light rays to ensure a perfectly formed image appears on the light sensitive surface, such as a film or CCD. The elements are arranged in groups and may be seen in specification sheets as, for example, 6 elements in 4 groups. That configuration may have two single elements and the other four grouped in pairs.

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Lens f/Stop Range: 1.8-22
Lens f/Stop Range:
This is the minimum and maximum aperture of a lens.

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Lens Type: Prime
Lens Type:
This is the type of lens.

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Focus Drive: 3.3"" (8.38 cm)
Focus Drive:
The internal autofocus drive of a lens.

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Angle of View (diagonal): 75.4
Angle of View (diagonal):
Area of a scene that a lens covers or sees. Determined by the focal length of the lens

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Maximum Aperture: f/1.8
Maximum Aperture:
How wide a lens can be opened.

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Macro Magnification Factor: 1:2.9
Macro Magnification Factor:
A lens with a 1:1 magnification factor produces a projected image on the sensor which is the same as the subject. A 1:1 magnification factor is usually considered the minimum for a lens to be described as a “macro” lens. Specialist macro lenses are often 1:3 or even 1:10 magnification factors, meaning that 1mm across the subject becomes 3mm or 10mm when projected onto the sensor, thus 3 or 10 times magnification.

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Focus Type: Auto / Manual
Focus Type:
The type of focus of the lens from full manual control to auto focus.

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Mount Type: Pentax / Samsung
Mount Type:
This is the mount type for the lens to attach to the camera body.

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In The Box

- Sigma 28mm F1.8 EX ASP Macro for Samsung
- Front & Rear Lenscaps
- Hood
- Case

Accessories

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Polarizing Filters

Filters

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