HD Pentax-D FA* 85mm F1.4 ED SDM AW


The HD Pentax-D FA* 85mm F1.4 ED SDM AW lens name features a mouthful of acronyms. Below is an explanation of various terms pertinent to this lens:


"HD" is the name of the current most advanced coatings available for Pentax lenses. Building on the famous SMC coatings, it improves contrast and flare management.


"D FA" refers to a lens designed for full frame digital cameras.  The lens carries information used for specific program lines, in-camera lens corrections, and so forth. It is also fully usable with APS-C sensors.


A star symbol denotes a lens being part of Pentax's top of the line (sometimes called "professional") lenses. They are usually larger lenses with fast apertures, all-weather protection, and superior optical performances.


"F" is the maximum aperture of the lens, 1.4 in this case.


"SDM" means Supersonic Direct-drive motorAs per RICOH the SDM autofocus motor in the 85mm is of a new generation introduced with the D FA 24-70mm. With the D FA* 85mm, Pentax completely redesigned the motor, resulting in 1.3x the torque of the D FA* 50mm, an impressive lens by itself.


"AW" means the the lens is weather resistant and can be used in "all weather". It cannot be submerged but will resist splashes, rain, snow, dust and other adverse conditions. AW is superior to WR; since this lens both zooms and focuses internally, a high degree of water resistance is expected.


"SP" is not part of the lens name, but still an important part of its characteristics. Super Protect is a type of coating used by Pentax that helps repel dust and grease on the front element, making the lens easier to clean.

Below are the lens specifications.

Lens Name

HD Pentax-D FA* 85mm F1.4 ED SDM AW

Optical Formula

12 elements in 10 groups (three super ED glass lens elements and one aspherical element)

Image Circle 35mm (Full frame)
Auto-Exposure Support Yes
Construction Metal
Field of View

Diagonal / Horizontal

APS-C: 19 ° / 16.1 °
Full frame: 28.5 ° / 23.9 °

Aperture Range F1.4 - F16
Aperture Blades 9 rounded
Aperture Ring No
Max. Magnification 0.12x
Focus Type SDM
Minimum Focusing Distance 85 cm
Internal Focus  Yes
Filter Thread Diameter 82mm
Cap Yes, clip-on
Hood Yes, bayonet cylinder, PH-RBG82
Case Yes, S130-160
Diameter x Length 95 x 123.5 mm (3.7 x 4.9 inches)
Weight 1255 g (hood +100g)
Pentax Mount Designation KAF4
Weather Sealing Yes
Price (US MSRP)


Launch Date


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