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Pentax SMC M 50mm f/1.7 : Specifications and Opinions

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The Pentax SMC M 50mm f/1.7 is a standard lens for FF and APS-C, manufactured from 1977 to 1984 (discontinued). The focus is done by Manual Focus, it does not have image stabilization. The average price was 40 €;

37 users have given it an average vote of 9.4 out of 10.

Specifications
Focal lenght	50 mm
Angle of view	46.8°
Format	FF, APS-C
Max. aperture	f/1.7
Aperture blades	6
Lenses/Groups	6 elements in 5 groups
Min. focus distance	0.45 meters
Reproduction ratio	0.15x
Features
Stabilization	No
Focus	Manual Focus
Internal Focus	No
Built and notes
Tripod ring	No
Extenders	No
Filters	49 mm
Lens hood	Yes (not supplied)
Weather sealing	No
Weight	185 g
Dimensions	31 x 63 mm
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Reviews

What do you think about this lens?

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The following opinions have been automatically translated with Google Translate.

Takeao

sent on December 12, 2025

Pros: Sharpness, all metal (except the dials which are plastic)

Cons: I can't find any... Given the year in which it was released

Opinion: I find myself with one as the owner of a Pentax Mx that is no longer working. Unfortunately my lens is mechanically faulty, the aperture closes from 1.7 to 5.6 then freezes. The MAF ring nut is fine. however, as far as it reaches as an aperture it leaves me stunned by the sharpness. I mount it on a Lumix G100 with adapter ring. I conclude by saying that it is a pleasure to still be able to use it. I also have a 28mm f2.8 and that's also a Mr. lens.

Pi.Ci

sent on May 23, 2024

Pros: Lightweight and compact, all metal, low price compared to the great quality it offers

Cons: It's just a little laborious to use, it's all manual. But you know when you buy it

Opinion: Bought a month ago for a few euros a perfect copy arrived The rings are excellent, minimum distance of MaF of 45 cm, depth of field scale for hyperfocal (can be useful) for those interested go to Pentaxforum and will find only excellent reviews It is not a lens framed and shot, it must be used calmly and you have to take into account some photos to throw away, But for a few euros you can take home an excellent product from almost 50 years ago. Recommended for those who want to get nice blurry and have patience

Carlo67

sent on July 02, 2019

Pros: Light, good slow coating, compact.

Cons: At full opening it has problems with sharpness, contrast and CA. I would have expected better even to more closed diaphragms... but I have to note that my pentacon 50 f1.8 in m42 is considerably higher across the board. The Olympus 50 f1.8 car (zuiko) even better than both.

Opinion: In my humble opinion, having a copy practically as new in all, the fame of this lens is much more legendary than real. Those who praise so much of the merits have not tried the peers Olympus, pentacon, konica exanon, and Minolta rokkor. The same applies to the Pentax m 50 f1.4, inexorably detached from the Canon fd 50 1.4 and even the revuenon 50 1.4, not to mention the olympis and Minolta...

Ioria83

sent on March 18, 2019

Pros: Sharpness, bokeh, colors

Cons: If we have to find one by force I would say surrender; A little too contraed. Assuming it can be considered a defect...

Opinion: A razor. Small, light, robust, functional and very sharp. It has an elegant bokeh and that vintage rendition, for the aficionados of the genre is a godsend, which combined with a crazy sharpness makes it a fabulous product. Remember that it is a vintage lens and then you work in total manual, which requires a minimum of expertise on various settings... Isn't this also the beauty of photography? :D I personally recommend it to anyone. Minimum cost maximum yield!

Enzozaza

sent on December 09, 2017

Pros: sharpness, colors, construction, compactness

Cons: if it were not for the fact that the internal "fin" of protection of the diaphragm transmission, create problems for my Eos 5D, I would say absolutely NOTHING

Opinion: It is a point that I have known practically since it entered the market. I tried it, almost by chance, on the Pentax MEsuper of my cousin, in the 80s and, although not an expert, I immediately noticed the incredible quality of this perspective: that sharpness and colors! every time I find it at the markets I buy it; pity not being able to use it, directly, on my old 5D. Since, however, I have several, one, (the aesthetically more battered) I sacrificed and I cut that inner flange (fin-shaped) that prevents grafting on Canon. What to say; excellent!

There are 5 more reviews. Show all »

Photos taken with Pentax SMC M 50mm f/1.7

The flock

by Alcenero
145 comments, 4951 views

HI RES 6.0 MP

Amiata January 2023

by Alcenero
114 comments, 2994 views

HI RES 24.1 MP

Sadie

by Paolo Paterlini
21 comments, 11943 views

HI RES 6.0 MP

Thousand Miles 2021

by Alcenero
101 comments, 3018 views

Alien Parking

by Alcenero
111 comments, 2264 views

HI RES 24.1 MP

Twelve lines with Xll

by Igna
41 comments, 3837 views

HI RES 15.9 MP

Dehumanizer

by Alcenero
76 comments, 2089 views

HI RES 24.1 MP

On the boulevards of Tirana

by Alcenero
82 comments, 2234 views

HI RES 5.1 MP

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Fall in love on the Orbetello lagoon

by Alcenero
94 comments, 2339 views

Illo Tempore -

by Alcenero
87 comments, 2566 views

HI RES 4.3 MP

Don't run, Pienza doesn't run away

by Alcenero
76 comments, 1004 views

HI RES 5.1 MP

Black and white panning

by Alcenero
78 comments, 1975 views

Tubular geometries

by Alcenero
60 comments, 1463 views

HI RES 5.8 MP

Untitled Photo

by Tore Serra
30 comments, 4753 views

Sadie

by Paolo Paterlini
3 comments, 6307 views

Salticidae mustachioed

by Tore Serra
20 comments, 4055 views

Heliophanus flavipes

by Mattfala
32 comments, 4016 views

A place in the sun

by Alcenero
42 comments, 436 views

HI RES 6.0 MP

S.t.

by Carlo Marchese
23 comments, 1539 views

HI RES 10.1 MP

Scatophaga stercoraria

by Mattfala
44 comments, 6366 views

Untitled Photo

by Fabioviti
16 comments, 5412 views

HI RES 12.2 MP

Philaeus chrysops female

by Mattfala
43 comments, 7003 views

Sadie

by Paolo Paterlini
2 comments, 2835 views

HI RES 6.0 MP

Pansy

by Fabrix
12 comments, 2342 views

Bathtime

by Tore Serra
13 comments, 2556 views

Evarcha jucunda

by Mimmo Macaluso
29 comments, 3732 views

Almost only 1

by Marzio Iotti
6 comments, 1492 views

Philaeus chrysops

by Mattfala
7 comments, 2889 views

I'm watching you!

by Andrewvisk
18 comments, 1514 views

HI RES 13.7 MP

Untitled Photo

by Mirkopetrovic
2 comments, 1296 views

Ilaria

by Paolo Paterlini
9 comments, 2619 views

HI RES 4.2 MP

Untitled Photo

by Diego96
9 comments, 1793 views

HI RES 14.5 MP

Landscape 5

by Marzio Iotti
8 comments, 1061 views

Untitled Photo

by Tore Serra
11 comments, 2110 views

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Euophrys rufibarbis

by Mimmo Macaluso
22 comments, 4245 views

Phidippus regius (female)

by Anto78
9 comments, 2160 views

Pentax smc 50-1.7

by Fabrix
4 comments, 2653 views

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Reviews » Lenses » Lenses Pentax » Pentax SMC M 50mm f/1.7

Pentax SMC M 50mm f/1.7 : Specifications and Opinions

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Reviews

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Photos taken with Pentax SMC M 50mm f/1.7