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Pentax DA 50mm f/1.8 SMC Lens


PENTAX RICOH IMAGING COMPANY, LTD. is pleased to announce the launch of the smc PENTAX-DA 50mm F1.8 lens. Designed for exclusive use with PENTAX K-mount interchangeable-lens digital cameras, this unifocal, medium-telephoto lens features a large maximum aperture and a round diaphragm to produce a natural, beautiful bokeh (out-of-focus) effect, making it ideal for portraits and casual snapshots.

The DA 50mm f/1.8 Lens from Pentax is a fast f/1.8 lens for cameras with a Pentax K mount. Mounted to a camera with an APS-C sensor, this lens gives an angle of view equivalent to a 76.5mm telephoto lens–ideal for portraits. The wide f/1.8 aperture makes this an essential lens for working in low light, and it also delivers beautiful bokeh (the out-of-focus portion of a photograph). This lightweight (4.3 oz) lens is very compact–just 1.5″ (3.8 cm) long. The addition of Pentax Super Protect (SP) coating to the lens helps prevent dust, water, grease and other substances from attaching themselves to a lens and degrading image quality.

High-quality image description

Thanks to state-of-the-art PENTAX optical design technology, the image circle of the lens has been optimized for K-mount interchangeable-lens digital cameras to effectively compensate astigmatism for sharp, clear images.

Easy-to-handle medium-telephoto lens

When mounted on a PENTAX K-mount interchangeable-lens digital camera body, this medium-telephoto lens offers a focal length of approximately 76.5mm in the 35mm format, offering a moderate-telephoto perspective perfect for portraiture with a smooth, beautiful bokeh effect in the background and snapshots cropping a part of the subject. Its front surface is treated with the PENTAX-original SP (Super Protect) Coating to not only repel dust, water and grease, but also allow easy removal of grease adhering to the surface. This means worry-free use in all kinds of shooting locations.

Large maximum aperture

Thanks to its large F1.8 maximum aperture, the lens can easily produce images with a very shallow depth of field. Its round diaphragm produces a natural, beautiful bokeh effect, while minimizing streaking of point light sources. The large aperture also makes it possible to use faster shutter speeds under poor lighting conditions to minimize the risk of camera shake and subject shake.

Compact, lightweight design

Measuring a mere 38.5 millimeters in length and weighing just 122 grams, this lens has the compact, lightweight design that lets it come along on every outing. Its solid, refined appearance matches the design of a top-class camera body.

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Focal Length 50mm
(Equivalent to 76.5mm in 35mm format)
Aperture F1.8
Minimum Aperture F22
Lens Construction 6 elements in 5 groups
Angle of View 31.5° (wiith PENTAX D-SLR camera body)
Lens Mount KAF
Minimum Focusing Distance 0.45 (1.48ft)
Maximum Magnification 0.15x
Filter Diameter 52mm
Diaphragm control Fully Automatic
Number of Diaphragm Blades 7
Lens hood RH-RA52mm (Option)
Lens cap Lens Cap O-LC52N
Lens case S70-70 (Option)
Maximum Diameter & Minimum Length φ63.0mm x 38.5mm (2.5 inch x 1.5 inch)
Weight 122 g / 4.3 oz
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