Sigma 105mm F2.8 EX DG Macro Lens
For Pentax K Mount

Macro capable with reproduction ratio of 1:1 or greater.Macro capable with reproduction ratio of 1:1 or greater.Fixed focal-length. No zoom.Fixed focal-length. No zoom.Rectilinear are normal lenses that show straight lines as straight lines.Rectilinear are normal lenses that show straight lines as straight lines.Thread size in milimeters for screw-on filters.Thread size in milimeters for screw-on filters.58Autofocus LensAutofocus Lens

Lens Description

The Sigma 105mm F2.8 EX DG Macro is a short telephoto prime designed for cameras with a Full-Frame sensor. This bright prime has a 105mm focal-length.

This prime lens focuses down to 32cm from the imaging plane, capturing subject with a maximum 1X magnification. The high manification of the Sigma 105mm F2.8 EX DG Macro allows it perform true macro photography. The lens supports autofocus and features a switch to disengage AF for focusing manually. While this lens is capable of AF, it does not have a built-in focus motor. It can only focus with a compatible camera body which features a mechanical AF-coupling.

The lens weighs 450g.

This version of the lens has a Pentax K mount. It directly attaches and is fully compatible with all Pentax K mount cameras with Full-Frame or smaller sensors. Sigma also makes this lens for Canon EF, Nikon F, Four-Thirds, Sony A and Sigma S mounts.

Sigma 105mm F2.8 EX DG Macro
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Sigma 105mm F2.8 EX DG Macro

Focal-Range

11mm500mm
105mm
FOCAL-RANGE OF Pentax K MOUNT LENSES WITH AT LEAST Full-Frame COVERAGE

Angle-Of-View

126°
23°
ANGLE OF VIEW OF Pentax K MOUNT RECTILINEAR LENSES WITH Full-Frame+ COVERAGE

Maximum Aperture

1.25
2.8
MAXIMUM APERTURE OF Pentax K MOUNT LENSES WITH AT LEAST Full-Frame COVERAGE

Viewing Angle Range

Sigma 105mm F/2.8

Maximum Aperture

Compared to other Pentax K Full-Frame lenses.
23°
Max F/2.8

Magnification

0.07X5X
1X
MAGNIFICATION OF Pentax K MOUNT LENSES WITH AT LEAST Full-Frame COVERAGE

Weight

155g3100g
450g
WEIGHT OF Pentax K MOUNT LENSES WITH AT LEAST Full-Frame COVERAGE

Sigma 105mm F2.8 EX DG Macro Specifications

Brand Sigma Model 105mm F2.8 EX DG Macro
Mount Max FLM 1X
Focal Length 105mm View Angle 23°
Max ApertureF/2.8Min ApertureF/22
Min Focus32cmMagnification1X
Filter Size58mm Aperture Blades8
Size (D x L)74 x 95mm Weight450g
TiltN / A ShiftN / A
Stabilization ProtectionNone
Zoom Drive N / A Focus Drive AF with MF Switch
Zoom Mechanism N / A Focus Mechanism External
Hood Bayonet Focus Motor External
Perspective RectilinearIntroduced2006-02-24

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Sigma 105mm F/2.8 Facts

Sigma 105mm F2.8 EX DG Macro
Macro capable with reproduction ratio of 1:1 or greater.Macro capable with reproduction ratio of 1:1 or greater.Fixed focal-length. No zoom.Fixed focal-length. No zoom.Rectilinear are normal lenses that show straight lines as straight lines.Rectilinear are normal lenses that show straight lines as straight lines.Thread size in milimeters for screw-on filters.Thread size in milimeters for screw-on filters.58Autofocus LensAutofocus Lens
105mm Focal-Length F/2.8 Constant Aperture
58mm Filter Thread AF with MF Switch
Pentax K Mount Full-Frame Coverage
450g Lens Weight 74 x 95mm (D x L)
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