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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 can focus down to 32cm from the imaging plane which gives it a maximum magnification of 1X. 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.

This version has a Pentax K lens mount. Follow this link for all current compatible digital cameras: Pentax K mount cameras with Full-Frame or smaller sensors. Sigma also made this lens available for Canon EF, Nikon F, Four-Thirds, Sony A, Sigma S mounts.

Sigma 105mm F2.8 EX DG Macro

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


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 1 Max Crop-Factor
450g Lens Weight 74 x 95mm (D x L)
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