Pentax DA 50mm lens : Wikipedia, the free encyclopedia

Pentax DA 50mm lens

Photographic lens

SMC Pentax-DA 50mm f/1.8
Technical data
Maker	Pentax
Type	Prime
Focal length	50mm
Focal length (35mm equiv.)	75mm
Crop factor	1.0
Aperture (max/min)	f/1.8 / f/22
Close focus distance	0.45 metres (1.5 ft)
Max. magnification	0.15x
Diaphragm blades	7, rounded
Construction	6 elements in 5 groups
Features
Application	Normal prime
Physical
Max. length	38.5 millimetres (1.52 in)
Diameter	63.0 millimetres (2.48 in)
Weight	122 grams (4.3 oz)
Filter diameter	52mm
Accessories
Lens hood	RH-RA 52mm
Case	S70-70
Angle of view
Diagonal	46° (full frame) 31.5° (APS-C)
History
Introduction	2012
Retail info
MSRP	$249.95 USD

The SMC Pentax-DA 50mm f/1.8 lens is a normal prime lens for the Pentax K-mount. The 75mm equivalent focal length on APS-C cameras and fast f/1.8 aperture make it well suited for portrait photography. It uses a simple double-Gauss design of 6 elements in 5 groups.

Similar lenses from other manufacturers include the Canon EF 50mm f/1.8 II and Nikon AF Nikkor 50 mm f/1.8D.

External links

Media related to SMC Pentax-DA 50mm F1.8 at Wikimedia Commons
Ricoh Imaging: SMC Pentax-DA 50mm f/1.8

Pentax K-mount lenses

DA*

Prime	DA* 55mm DA* 200mm DA* 300mm
Zoom	DA* 11-18mm DA* 16-50mm DA* 50-135mm DA* 60-250mm

Prime	DA 14mm DA 35mm DA 40mm XS DA 50mm DA 560mm
Zoom	DA 10-17mm Fish-eye DA 12-24mm DA 16-45mm DA 16-85mm DA 17-70mm DA 18-50mm RE DA 18-55mm DA 18-135mm DA 18-250mm DA 18-270mm DA 50-200mm DA 55-300mm DA 55-300mm PLM

DA Limited

Prime	DA 15mm Limited DA 21mm Limited DA 35mm Macro Limited DA 40mm Limited DA 70mm Limited
Zoom	DA 20-40mm Limited

D FA and D FA*

Prime	D FA 50mm Macro D FA* 50mm D FA* 85mm D FA 100mm Macro D FA 100mm Macro WR
Zoom	D FA 15-30mm D FA 24-70mm D FA 28-105 D FA* 70-200mm D FA 70-210mm D FA 150-450mm

FA Limited

Prime	D FA 21mm Limited FA 31mm Limited FA 43mm Limited FA 77mm Limited

FA*

Prime	FA* 24mm FA* 85mm FA* 200mm FA* 200mm Macro FA* 300mm FA* 400mm FA* 600mm
Zoom	FA* 28-70mm FA* 80-200mm FA* 250-600mm

FA and FA J

Prime	FA 20mm FA 28mm FA 28mm Soft FA 35mm FA 50mm FA 50mm Macro FA 85mm Soft FA 100mm Macro FA 135mm
Zoom	FA J 18-35mm FA 20-35mm FA 24-90mm FA 28-70mm FA 28-80mm FA J 28-80mm FA 28-90mm FA 28-105mm FA 28-200mm FA 35-80mm FA 70-200mm FA J 75-300mm FA 80-200mm FA 80-320mm FA 100-300mm

F and F*

Prime	F 28mm F 50mm F 85mm F 100mm Macro F 135mm F* 300mm F* 600mm
Zoom	F 17-28mm Fish-eye F 24-50mm F 28-80mm F 35-70mm F 35-80mm F 35-105mm F 35-135mm F 70-210mm F 80-200mm F 100-300mm F* 250-600mm

A and A*

Prime	A 15mm A 16mm Fish-eye A 20mm A 24mm A 28mm A 35mm A 50mm A 50mm Macro A* 85mm A 100mm A 100mm Macro A 135mm A* 135mm A 200mm A* 200mm A* 200mm Macro A* 300mm A 400mm A* 400mm A* 600mm A* 1200mm
Zoom	A 24-50mm A 28-80mm A 28-135mm A 35-70mm A 35-80mm A 35-105mm A 35-135mm A 35-210mm A 70-210mm A 80-200mm

M and M*

Prime	M 20mm M 28mm M 35mm M 40mm M 50mm M 50mm Macro M 85mm M 100mm M 100mm Macro M 120mm M 135mm M 150mm M 200mm M* 300mm M 400mm
Zoom	M 24-35mm M 24-50mm M 28-50mm M 35-70mm M 40-80mm M 75-150mm M 80-200mm

original K-series

Prime	K 15mm K 17mm Fish-eye K 18mm K 20mm K 24mm F2.8 K 24mm F3.5 K 28mm F2 K 28mm F3.5 K 28mm F3.5 shift K 30mm K 35mm F2 K 35mm F3.5 K 50mm F1.2 K 50mm F1.4 K 50mm macro K 55mm F1.8 K 55mm F2 K 85mm F1.8 K 85mm soft K 100mm bellows K 100mm macro K 105mm K 120mm K 135mm F2.5 K 135mm F3.5 K 150mm K 200mm F2.5 K 200mm F4 K 300mm K 400mm K 500mm K 1000mm K 1000mm reflex K 2000mm reflex
Zoom	K 28-80mm K 45-125mm K 80-200mm K 85-210mm F3.5 K 85-210mm F4.5 K 135-600mm K 400-600mm

Prime