Pentax DA* 300mm lens

smc PENTAX-DA* 1:4 300mm ED [IF] SDM
Technical data

Maker	Pentax
Type	Prime
Focal length	300mm
Focal length (35mm equiv.)	450mm
Aperture (max/min)	f/4 / f/32
Close focus distance	140 centimetres (55 in)
Max. magnification	0.24x
Diaphragm blades	9
Construction	8 elements / 6 groups
Features
Manual focus override	Yes
Ultrasonic motor	Yes
Weather-sealing	Yes
Unique features	Quick-shift focus, SP (Super Protect) coating, filter window, detachable tripod mount
Application	Supertele
Physical
Max. length	184 millimetres (7.2 in)
Diameter	83 millimetres (3.3 in)
Weight	1,070 grams (38 oz)
Filter diameter	77mm
Accessories
Lens hood	PH-RBK 77 mm
Angle of view
Diagonal	5.4 °
Retail info
MSRP	1,399.95 USD

The smc PENTAX-DA* 1:4 300mm ED [IF] SDM is a supertele prime lens for Pentax K-mount. It uses Pentax' silent SDM motor for autofocus on compatible cameras (K10D^[1] and K200D upwards), and has Quick Shift Focus to allow manual adjustments in autofocus mode.

Reception

Photozone reviewed the lens favourably, stating, "in terms of resolution and contrast the lens is able to produce very good results straight from the max. aperture setting" and "mechanical quality of the lens is absolutely exceptional thanks to high quality materials and seals against dust and moisture". Of the ultrasonic autofocus motor, they wrote that it "works like a breeze - it's both fast and almost silent." Overall, they concluded that the lens is "highly desirable lens for sports and wildlife photographers."^[2]

ColorFoto wrote the lens had outstanding sharpness over the entire frame, even wide open,^[3] and PopPhoto.com said that "images shot in the field were satisfyingly contrasty and sharp."^[4]

References

smc PENTAX DA Star 300mm F4 ED(IF) SDM at Ricoh Imaging Americas Corp.

Pentax K-mount lenses

DA*

Prime	DA* 55mm DA* 200mm DA* 300mm

Zoom	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 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 100mm Macro D FA 100mm Macro WR

Zoom	D FA 24-70mm D FA* 70-200mm D FA 150-450mm

FA 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

Special

DA 1.4× Rear Converter
AF 35-70mm (for ME F)

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