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Pentax Telephoto 55mm f/1.4 DA* SDM Autofocus Lens for Digital SLR

BH #PE5514DA • MFR #21790
Pentax Telephoto 55mm f/1.4 DA* SDM Autofocus Lens for Digital SLR
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Pentax DA* 55mm f/1.4 SDM Overview

The Pentax 55mm f/1.4 DA* SDM Autofocus Lens is a compact and bright short-telephoto lens of the highest order, made exclusively for Pentax digital SLR cameras.  In a stocky housing ready for harsh conditions, you'll get a bright f/1.4 aperture-worlds away from the experience you're used to with more common zooms-that opens up new creative doors to you as a photographer.

This lens was born to shoot between f/1.4 and f/2.8, and comes with a 9-bladed aperture diaphragm which shows up as perfectly round when you stay between f/1.4-2.8.  Shoot dramatic portraits with bright point light sources behind the subject, and you'll be dazzled with lovely diffuse, circular out-of-focus highlights that make everybody look better.  Beyond portraits, this lens works well any time you would use a moderate telephoto focal length.

The focusing system of this lens is SDM only; there is no screw on the rear of the lens barrel to have the AF driven by a body-based motor.  This allows the lens to move incredibly quick, driven by an internal motor and with the Quick-Shift system providing manual override capacity to you any time you want it with no buttons to switch; but you'll need a Pentax body which allows SDM autofocus (all current Pentax bodies support SDM, but the *IST series does not).

Does NOT provide autofocus upon non-SDM-enabled Pentax cameras.
Brilliantly-sharp portrait lens which gathers plenty of light
Completely-rounded aperture diaphragm from f/1.4-2.8 for beautiful out-of-focus highlights
Speedy SDM autofocus motor provides fast, silent response with Quick-Shift full-time manual override
Pentax's unique SP water and dirt-repelling coating on both external surfaces
Pentax's "Aero Bright" internal lens yields high transmissivity and reduced flare
Dust and moisture-resistant housing
Essentially equivalent to an 82.5mm f/1.4 lens upon 35mm SLR cameras
UPC: 027075147348

Pentax DA* 55mm f/1.4 SDM Specs

Focal Length55mm (35mm Equivalent Focal Length: 82.5mm)
Maximum Aperturef/1.4
Minimum Aperturef/22
Lens MountPentax K
Lens Format CoverageAPS-C
Angle of View28.6°
Minimum Focus Distance1.48' / 45 cm
Maximum Magnification0.17x
Optical Design9 Elements in 8 Groups
Diaphragm Blades9
Focus TypeAutofocus
Image StabilizationNo
Filter Size58 mm (Front)
Dimensions (ø x L)2.8 x 2.6" / 7.11 x 6.6 cm
Weight13.23 oz / 375 g
Packaging Info
Package Weight1.395 lb
Box Dimensions (LxWxH)5.8 x 4.65 x 4.4"

Pentax DA* 55mm f/1.4 SDM Reviews

Great Low Light Lens

By Christopher
Rated 5 out of 5
Date: 2021-03-16

I bought this lens to photograph low light events without a flash. I love the contrast, detail, and depth of focus. And the lens is pretty quiet for situations where you don’t want to be a distraction. Noticeably better low light photos than with their F/1.8 lens.

Pretty good lens

By Hymeth
Rated 4 out of 5
Date: 2018-02-09

I have tested for portrait photography and is incredible, so it is for low light pictures, but is not Full Frame.

Great Lens.

By Chris
Rated 4 out of 5
Date: 2018-01-18

Pros:� Great lens with a very short DoF.� Focus is sharp and clean.� Great for portraits. Cons:� Focus motor went out.� Tried it on both of my K-3s.� Motor made it about 2yrs. This is the first issue I've ever had with Pentax, so I'm chalking this one up to things happens.� I really enjoyed this lens and am planning to replace it with another one.

Generally great, but sometimes a bit off

By Andrew
Rated 4 out of 5
Date: 2017-01-03

A very solid and beautifully built lens that mostly produces very nice photos. The colors and details are great, and it works very well for night photography. In particular, it handles nighttime street lights very well (much better than, say, the 40mm F2.8 limited, which produces very strange flares). My only criticism is that sometimes, particularly in weird lighting, it just seems cursed. On the order of taking 20 photos of a complex sculpture in the late twilight and all of them turning out blurry. All in all, a very nice lens to take out in the rain.

Great for Portrait

By Kyle
Rated 5 out of 5
Date: 2021-02-21

A little wide for headshots but still my favorite lens in my bag. fast focus, sharp with a nice bokeh. fun to play with wide open for some great selective focus shots. fun for landscape too. I love this lens

Superb glass, faulty AF motor.

By Fredrik Hovind
Rated 2 out of 5
Date: 2020-09-28

SDM died after a couple of years. After warranty had ran out. Good manual focus lens, but expensive for that.

Great lens, excellent bokeh

By Will
Rated 5 out of 5
Date: 2018-10-25

I use this lens with my Pentax KP and love it. It has creamy bokeh for portrait photos and when stepped down is excellent for landscape. It has become one of my two favorite lenses. One reviewer gave it a "one" star because it showed dark corners while using it on his K-1, which is a full frame camera. While this lens can be used on a full frame, it is made for the AP-C camera.

Love my new 55mm lens

By Catherine
Rated 5 out of 5
Date: 2018-07-06

Really happy with my new lens. Love the crispness of eyes in portraits and the bokeh backgrounds with the shallow depth of field. Worth every penny and i have a feeling it will be a go-to lens!

See any errors on this page? Let us know



Would this lens work with the NEW Pentax FULL FRAME K1?
Asked by: Maria H.
My own research on this subject indicates that yes, the general opinion is that this lens covers full frame. I wouldn't hesitate myself to count it as a potential normal prime for a FF Pentax. My only recommendation would be to make your own interpretation of the available data, at least until the K-1 is in general circulation and a lot of people with the lens have tried it out on the new body. One thing's for sure-- it's a great mild tele for a crop sensor Pentax.
Answered by: Pamela B.
Date published: 2018-08-28


did anyone have back focusing problem?
Asked by: Cenk A.
I havent experienced any issues with this lens when using a K3
Answered by: Anonymous
Date published: 2021-12-28


does this lense work on a pentax 645D Medium Format DLSR?
Asked by: Anonymous
No, this is not even technically a full frame 35mm lens. This lens is part of Pentax's performance series of APS-C sized sensor lenses. It isn't even the same mount for the 645 series.
Answered by: David K.
Date published: 2018-08-27


would this lense work on my Pentax 645D Medium Format DSLR camera?
Asked by: Anonymous
Answered by: QUYET L.
Date published: 2018-08-27
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