Pentax DA* 55mm lens

smc Pentax-DA* 55mm f/1.4 SDM
Maker Pentax
Technical data
Type Prime
Focal length 55mm
Focal length (35mm equiv.) 82.5mm
Crop factor 1.5
Aperture (max/min) f/1.4 / f/22
Close focus distance 0.45 metres (18 in)
Max. magnification 0.173x
Diaphragm blades 9, rounded
Construction 9 elements / 8 groups
Features
Manual focus override  Yes
Ultrasonic motor  Yes
Weather-sealing  Yes
Unique features Weather-resistant
Application Portrait
Physical
Max. length 66.0 millimetres (2.60 in)
Diameter 70.5 millimetres (2.78 in)
Weight 375 grams (13.2 oz)
Filter diameter 58mm
Accessories
Lens hood PH-RBH 58mm
Case S90-100
Angle of view
Diagonal 28.6°
History
Introduction 2008
Retail info
MSRP $799.95 USD

The smc Pentax-DA* 55mm f/1.4 SDM lens is a professional prime lens for the Pentax K-mount. It is designed for portrait use[1] with a 35mm equivalent focal length of 82.5mm. The lens features weather sealing, an SDM ultrasonic motor for quiet autofocus, and has 9 rounded diaphragm blades for smoother bokeh. Autofocus speed is similar to an equivalent screwdrive lens.[2]

References

  1. ↑ http://www.dpreview.com/lensreviews/pentax_55_1p4_p15/ DPReview: Pentax smc DA* 55mm 1:1.4 SDM review
  2. ↑ http://www.digitalcamerareview.com/default.asp?newsID=3916&review=pentax+da+55mm DigitalCameraReview: Pentax DA* 55mm f/1.4 SDM Lens Review

External links

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