Pentax DA* 300mm lens

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

This article is issued from Wikipedia - version of the Friday, August 14, 2015. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.