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HomePhotographyLensesSLR LensesPentax DA 50mm f/1.8

Pentax smc DA 50mm f/1.8 Lens

BH #PE5018DA • MFR #22177
165 reviews
Pentax smc DA 50mm f/1.8 Lens
Key Features
  • Very Fast f/1.8 Maximum Aperture
  • Excellent Low-Light Lens
  • Pleasing Bokeh (Out-of-Focus Areas)
  • SP Coating Repels Dust, Water, Grease
Show More
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.
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Pentax DA 50mm f/1.8 Overview

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

Pentax DA 50mm f/1.8 Specs

Focal Length50mm (35mm Equivalent Focal Length: 76.5mm)
Maximum Aperturef/1.8
Minimum Aperturef/22
Lens MountPentax K
Format CompatibilityAPS-C
Angle of View31.5°
Minimum Focus Distance1.48' / 45.11 cm
Maximum Magnification0.15x
Optical Design6 Elements in 5 Groups
Diaphragm Blades7
Focus TypeAutofocus
Image StabilizationNone
Filter Size52 mm (Front)
Dimensions (ø x L)2.5 x 1.5" / 6.35 x 3.81 cm
Weight4.3 oz / 122 g
Packaging Info
Package Weight0.47 lb
Box Dimensions (LxWxH)3.85 x 3.7 x 3.45"
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YOUR RECENTLY VIEWED ITEMS

When used with K1 mark 2 will this still be 50mm?

When used with K1 mark 2 will this still be 50mm?
Asked by: lew
I would look at the Pentax Normal SMCP-FA 50mm f/1.4 Autofocus Lens linked here. https://bhpho.to/3fFVEfA
Answered by: Scott A.
Date published: 2021-06-03

is it all plastic?

is it all plastic?
Asked by: Dinh
Yes it is , but well build
Answered by: vilson
Date published: 2021-01-18

Would this mount to Pentax ME Super?

Would this mount to Pentax ME Super?
Asked by: andrew
This is a Pentaxk K-mount lents. Find out if your camera is a k-mount.
Answered by: Juan Carlos
Date published: 2020-08-12

Is this a full frame lens? I saw other sites ...

Is this a full frame lens? I saw other sites listing it as full frame.
Asked by: David
This lens is formatted for Pentax DSLRs with an APS-C sensor.
Answered by: Kirk
Date published: 2020-01-30

question

Does this lens work with an older Pentax P3?
Asked by: Trish D.
It will fit the camera, but I don't think you will be able to adjust the aperture manually. You can find manual lenses from the 70's and 80's that will work with your film camera. I have a couple of old pentax lenses that work with the k-70 but newer lenses aperture is not possible to adjust manually in old slr bodies.
Answered by: Emmanuel G.
Date published: 2018-08-28

question

Hi, does it come with lens cap or andy hood? Thanks
Asked by: Martin R.
Cap yes, hood no. The lens cap is a center pinch version. If you buy a hood, the size is 52mm. There are many brands of 52 mm hoods available at B&H, all much less expensive than the Pentax brand.
Answered by: Jay R.
Date published: 2019-02-13

question

Since this lens doesn't have aperture ring, What If I use it on Olympus OM-D EM5 Mark II with fotodix PK/M43 mount adapter(which doesn't have electronic contact), will aperture stay at f1.8 always? P.S. buying this lens primarily for pentax K5 and secondary for EM5 II.
Asked by: Vasanth V.
Correct, you wouldn't have control over the aperture and it would stay wide open at F/1.8
Answered by: Andrea O.
Date published: 2018-08-28

question

Does this lens have quick focus so that you can still manually focus when the lens is set to autofocus?
Asked by: Robert B.
With a little more force, you can make the focus ring to rotate when autofocus is on, but it feels like you shouldnt. It makes a grinding noise and when you autofocus again theres a weird clicking noise, which I think is things clicking back into place.
Answered by: Robert B.
Date published: 2019-02-13
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