Pentax DA 40mm lens

f/2.8 / f/22Close focus distance15.7 inches (0.40 m)Max. magnification0.13xDiaphragm blades9Construction5 elements in 4 groupsFeaturesManual focus override YesUnique featuresPancake lensApplicationNormal lensPhysicalMax. length0.6 inches (15 mm)Diameter2.5 inches (64 mm)Weight3.2 oz (91 g)Filter diameter49mm (30.5mm on hood)AccessoriesLens hoodMH-RC 49mmCaseDA 40mm Lens Soft CaseAngle of viewDiagonal39°HistoryIntroduction2004Retail infoMSRP$499.95 USD

The smc Pentax-DA 40mm f/2.8 Limited is a pancake lens for the Pentax K-mount. At only 0.6 inches (15 mm) long, it was the smallest lens made by Pentax until the 40mm XS lens was introduced. The lens has a 35mm equivalent focal length of 60mm; it is part of the Limited series of high-performance compact lenses. In August 2013 it was re-released with improved lens coatings and rounded aperture blades as HD Pentax-DA 40mm f/2.8 Limited.^[1]

The SMC Pentax-DA 40mm f/2.8 XS is an even thinner version of the SMC DA 40mm lens, at 9.1 millimetres (0.36 in) thick, released by Pentax on February 2, 2012. It features an aesthetic design by Marc Newson^[2][3] to match the Pentax K-01. It is currently one of the thinnest autofocus pancake lenses ever made.

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  DA 40mm f2.8 XS mounted on Pentax K-01

DA*

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

DA

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

Special

Zoom	AF 35-70mm (for ME F)