Pentax smc DA 50mm f/1.8 Lens

Pentax smc DA 50mm f/1.8 Lens

Pentax smc DA 50mm f/1.8 Lens

B&H # PE5018DA MFR # 22177
In Stock

Product Highlights

  • Very Fast f/1.8 Maximum Aperture
  • Excellent Low-Light Lens
  • Pleasing Bokeh (Out-of-Focus Areas)
  • SP Coating Repels Dust, Water, Grease
  • For APS-C Digital K-Mount Cameras
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Pentax 50mm f/1.8 overview

  • 1Description

The smc DA 50mm f/1.8 Lens from Pentax is a fast f/1.8 lens for cameras with a Pentax K mount. Mounted to a camera with an APS-C sensor, this lens gives an angle of view equivalent to a 76.5mm telephoto lens--ideal for portraits. The wide f/1.8 aperture makes this an essential lens for working in low light, and it also delivers beautiful bokeh (the out-of-focus portion of a photograph). This lightweight (4.3 oz) lens is very compact--just 1.5" (3.8 cm) long. The addition of Pentax Super Protect (SP) coating to the lens helps prevent dust, water, grease and other substances from attaching themselves to a lens and degrading image quality.

Very fast f/1.8 maximum aperture is ideal for low light situations and produces pleasing bokeh in the out-of-focus areas of a photograph
76.5mm telephoto equivalent in APS-C format
The lens is treated with the Pentax's original SP (Super Protect) coating, which repels dust, water, grease, and other substances that may adhere to the surface of the lens. The protective coating promotes trouble-free use in all kinds of shooting situations.
UPC: 027075217607
In the Box
Pentax smc DA 50mm f/1.8 Lens
  • Front and Rear Lens Caps
  • Limited 1-Year Warranty
  • Table of Contents
    • 1Description

    Pentax 50mm f/1.8 specs

    Performance
    Focal Length 50mm
    Comparable APS-C Focal Length: 76.5 mm
    Aperture Maximum: f/1.8
    Minimum: f/22
    Camera Mount Type Pentax K
    Format Compatibility Pentax Digital (APS-C)
    Angle of View 31.5°
    Minimum Focus Distance 1.48' / 45.11 cm
    Magnification 0.15x
    Maximum Reproduction Ratio 1:6.67
    Optical Design 6 Elements in 5 Groups
    Diaphragm Blades 7
    Features
    Image Stabilization No
    Autofocus Yes
    Tripod Collar No
    Physical
    Filter Thread Front: 52 mm
    Dimensions (DxL) 2.5 x 1.5" / 6.35 x 3.81 cm
    Weight 4.3 oz / 122 g
    Packaging Info
    Package Weight 0.5 lb
    Box Dimensions (LxWxH) 3.8 x 3.6 x 3.4"

    Pentax 50mm f/1.8 reviews

    smc DA 50mm f/1.8 Lens is rated 4.6 out of 5 by 156.
    Rated 5 out of 5 by from Excellent image quality and value I've only had this a week but the image quality is excellent, esp. when the price is considered. I've tested it with an artificial star and there is only, even wide open, only a slight trace of coma and virtually no astigmatism. No hint of field curvature or chromatic aberations. When used in my K50 the images are excellent wide open and only get better when stopped down to f/5.6. When used on my Q10, which is even more demanding due to the small pixel size, the images are still very, very good wide open. Much better than my older 50mm f/1.4 even when it is stopped down to f/2 and used with an APS-C format chip.
    Date published: 2015-12-10
    Rated 4 out of 5 by from Helpful Lens To Foster Creative Shots Great for lower light situations and creating bokeh. At wider apertures (F1.8, F2.0) the subject can appear blurry, but I felt this was due to the nature of a shallow depth of field and not the lens itself. It may be prudent to set to manual focus to obtain peak sharpness. I took a few photos of garden flowers at F1.8 (with auto focus) and was pleased with the quality and end result. Please note, I only noticed the slight blurriness with the lowest F-stops. This lens is quite lightweight compared to the 18-135 zoom lens that is usually attached to my Pentax K30. My neck and shoulders will appreciate the lightened load.
    Date published: 2015-05-18
    Rated 5 out of 5 by from A bit expensive, but great lens! I thought Pentax was really lacking a lens like this in their product line. The only Prime they had close to this was Pentax DA* 55mm f/1.4, which is amazing, but really expensive. Now this came to fill that gap. The images are really sharp, the autofocus is fast and accurate (Pentax K-r body) and the bokeh is very pleasant. Max sharpness is achieved around f/2, which is pretty good. There is almost no distortion and the images are beautiful. I think the DA* is even sharper, but I don't think it's worth the almost 3 times the price difference. If you want a nifty fifty like I did, I definitely recommend it!
    Date published: 2013-01-10
    Rated 3 out of 5 by from Plastic Fantastic It is noticably soft wide open, so don't buy it for the speed. It's decent when stopped down to f2.8; by f5.6 it's as sharp as anything. Auto focus is VERY loud but quick. The lens mount is plastic so I doubt it would stand up to heavy use. I honestly don't have a problem with the rest of the plastic. Structurally it seems sturdy enough, and plastic is probably more thermally stable than metal anyway. The mount though, should be a little tougher, in my opinion. This one was included with the K-3 by B&H, so I'm grateful to have it and it will see some use, but overall it isn't as good as other normal primes. I'd say it's worth having in the bag just because it weighs next to nothing.
    Date published: 2014-04-13
    Rated 5 out of 5 by from Phenomenal value and performance! This lens performs quite well wide open at f/1.8. Stopping down to 2.8 or more gives even sharper images and remains quite fast. Though the autofocus is loud, it is also fast and accurate on my K-50. Manual focus is fantastic on this because of the wide rotation range which I believe I read to be 190 degrees. The whole range is very smooth. The plastic construction is sturdy and seems durable. This and the older autofocus are what make it so affordable. This is an excellent value. I've done quite varied work so far with just this single lens and it has met every need like a champ.
    Date published: 2015-12-07
    Rated 3 out of 5 by from Lens is new but at moment I am not sure. I just purchased this lens and have only experimented with it twice but at moment I am not so happy. First pictures came out all blue. Second try produced less then very ordinary shots. However I think that I am too new to post anything negative and please allow me a bit more time to experiment some more. I only purchased this lens because I was led to understand that prime lenses produced sharper images but like I say I think I am too early to really post my results for your next customer. Hopefully this coming Thursday I will be able to get out and try again. Supposed to be a nice decent fall day in Chicago and anxious to use this lens.
    Date published: 2014-10-19
    Rated 1 out of 5 by from What a disaster... I bought this lens for my wife to use on her Pentax K-7. It does quite well at close range - minimum focus up to distances around 8 feet. However, from about 8 ft to 15 feet it just won't focus on the subject no matter what. I tried adjusting the fine focus in the camera body and it made no difference. I even tried to focus manually but to no avail. It didn't matter if the subject had high or low contrast. I tried multiple focus sensors on the camera as well as changing the camera orientation from horizontal to vertical and still no success. With or without flash it still won't return a sharp picture in that 8-15 ft range. I'm returning the lens.
    Date published: 2015-11-27
    Rated 2 out of 5 by from Disappointed with 50mm f1.8 I bought my first Pantax, a K-70 with the kit lens 18-135 mm only a few mounts ago . So, my experience with Pentax is limited. I thought I would buy the smc DA 50mm f/1.8 for those closeup pictures with nice blurred background. Lens looks and feels cheap which would be OK if the pictures where at least sharp. Similar pictures with the 18-135 kit lens are better and sharper on auto settings. Auto focusing with these lens and camera for portraits is so jumpy and difficult. I have not tried the manual focus to see if it makes any difference. However, I do not see any improvement over the kit lens. For me, it is not worth the investment.
    Date published: 2018-10-22
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    Customer Photos

    Pentax 50mm f/1.8 Q&A

    Pentax 50mm f/1.8 accessories

    Designed for use with:

    • Pentax K-3 II
    • Pentax K-5 IIs
    • Pentax K-50
    • Pentax K-500
    • Pentax K-70
    • Pentax K-S1
    • Pentax K-S2
    • Pentax KP
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