Sigma APO 300mm f/2.8 EX DG Lens for Pentax K

BH #SI30028DGPAF • MFR #195109
Sigma
Sigma APO 300mm f/2.8 EX DG Lens for Pentax K
Key Features
  • K-Mount Lens/Full-Frame Format
  • Aperture Range: f/2.8 to f/32
  • Two Extra-Low Dispersion Elements
  • Multi-Layer Coating
Combining reach and speed, the Pentax K-mount Sigma APO 300mm f/2.8 EX DG is a super-telephoto prime also characterized by its advanced optical and physical design. Its fast f/2.8 maximum aperture aids in isolating subjects using depth of field and also supports working in low-light conditions. Designated an apochromat, this lens uses a pair of extra-low dispersion elements to effectively eliminate color fringing and chromatic aberrations for high clarity and color accuracy throughout the aperture range. A multi-layer coating has also been applied to lens elements to control flare and ghosting for improved contrast and clarity.
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Sigma 300mm f/2.8 EX DG Overview

Combining reach and speed, the Pentax K-mount Sigma APO 300mm f/2.8 EX DG is a super-telephoto prime also characterized by its advanced optical and physical design. Its fast f/2.8 maximum aperture aids in isolating subjects using depth of field and also supports working in low-light conditions. Designated an apochromat, this lens uses a pair of extra-low dispersion elements to effectively eliminate color fringing and chromatic aberrations for high clarity and color accuracy throughout the aperture range. A multi-layer coating has also been applied to lens elements to control flare and ghosting for improved contrast and clarity.

Benefitting the optical attributes is an internal focus system, which provides quick autofocus performance with full-time manual focus override. The physical design also incorporates a fixed, rotating tripod collar for easy attachment to a tripod or monopod, and a drop-in filter slot permits working with rear 46mm filters, such as the included circular polarizer filter.

Super telephoto prime is designed for full-frame Pentax K-mount cameras, however can also be used with APS-C models where it provides a 450mm equivalent focal length.
Impressively bright f/2.8 maximum aperture suits working in available light conditions and also affords increased control over depth of field.
Apochromatic optical design utilizes two extra-low dispersion elements to significantly reduce color fringing and chromatic aberrations for increased clarity and color fidelity.
Multi-layer coating has been applied to individual elements to minimize flare and ghosting for improved contrast and color accuracy when working in strong lighting conditions.
Internal focusing design realizes quick autofocus performance as well as maintains the overall length of the lens during use.
Nine-blade diaphragm contributes to a pleasing bokeh quality.
A removable, rotating tripod collar offers well-balanced support for photographing atop a tripod or monopod with either vertical or horizontal shooting orientations.
Rear drop-in 46mm filters can be used and a circular polarizer filter is included for reducing reflections and increasing contrast and saturation.
Compatible with optional APO 1.4x EX DG and APO 2x EX DG teleconverters.

Sigma 300mm f/2.8 EX DG Specs

Focal Length300mm
Maximum Aperturef/2.8
Minimum Aperturef/32
Lens MountPentax K
Format CompatibilityFull-Frame
Angle of View8.2°
Minimum Focus Distance8.2' / 2.5 m
Maximum Magnification0.13x
Optical Design11 Elements in 9 Groups
Diaphragm Blades9
Focus TypeAutofocus
Image StabilizationNone
Tripod CollarRemovable and Rotating
Filter Size46 mm (Drop-In)
Dimensions (ø x L)4.69 x 8.44" / 119 x 214.5 mm
Weight5.28 lb / 2400 g
Packaging Info
Package Weight8.2 lb
Box Dimensions (LxWxH)12.8 x 9.3 x 9"
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question

Do they make a 2X Teleconverter for the Sigma 300mm f/2.8 Lens for Pentax?
Asked by: Anonymous
No. Sigma does not make their TC's in Pentax mount. But the Kenko 2X TC's will work just fine as well as retain autofocus with that lens.
Answered by: Carter B.
Date published: 2018-08-28

question

Whic type of telecovreter is optimal for it?
Asked by: Anonymous
The Vivitar 1.4x Teleconverter for Pentax will be compatible with the Sigma 300mm f/2.8 EX DG: http://bhpho.to/1m1j5t1
Answered by: Heather S.
Date published: 2018-08-28
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