Review SMC Pentax-M 1: 1,4 50mm

For the opportunity review of the SMC Pentax-M 1: 1,4 50mm Asahi OPT. CO., Japan Special thanks to Alexander Perever.

Pentax-m 50mm F1.4 SMC review

Pentax-m 50mm F1.4 SMC review

SMC Pentax-M 1: 1,4 50mm has in its design a modernized planar-type circuit - 7 elements in 6 groups. The line of the SMC Pentax-M 1: 1,4 50mm lens developed approximately like this: Super-Takumar (8 elements) -> Super Takumar under M42 -> Super Multi Coated Takumar -> S.M.C. Takumar -> SMC Pentax-K -> SMC Pentax-M -> SMC Pentax-A -> SMC Pentax-F (already autofocus) -> SMC Pentax-FA. This review presents the SMC Pentax-M 1: 1,4 50mm model, which is the compact version of the SMC Pentax-K (which already had a bayonet mount). The SMC Pentax-K and SMC Pentax-A versions are said to have stronger sharpness.

SMC Pentax-m 50mm F1.4 lens view from different angles

SMC Pentax-m 50mm F1.4 lens view from different angles

In fact, the Pentax SMC-FA 1mm f / 1,4 has an autofocus model for the SMC Pentax-M 50: 50 1.4mm, which will automatically focus on cameras that have a focus motor. Pentax SMC-FA 50mm f / 1.4 is a fairly popular lens among Pentax users, as it has a good price / quality ratio, although it is somewhere 5 times more expensive for the Pentax-M 1: 1,4 50mm SMC.

View of the SMC Pentax-m 50mm F1.4 lens on a modern camera

View of the SMC Pentax-m 50mm F1.4 lens on a modern camera

Main features of the SMC Pentax-M 1 lens: 1,4 50mm
1. The lens is manual. Focus is only available with hands.... The focusing ring moves smoothly. It is pleasant to aim at sharpness. MDF is 45cm - nothing special for fifty dollars. The infinity on the focusing distance indicator starts at 15 meters. The focusing ring rotates approximately 200 degrees, while the "trunk" of the lens moves forward one centimeter. MDF is 45cm. When focusing, the front lens does not rotate, you can safely use any light filters. When focusing, the entire lens unit moves in the middle of the lens barrel.

Soft effect and bokeh on SMC Pentax-M 1: 1,4 50mm

Soft effect and bokeh on SMC Pentax-M 1: 1,4 50mm

2. Aperture. The SMC Pentax-M 1: 1,4 50mm lens has a K mount and a jumping aperture. You can focus completely on the open, and when you release the shutter, the camera itself will close the aperture to the desired value. This lens can be planted and used on all Pentax cameras released since 1975. The diaphragm has 8 blades; when it is closed in the blur zone, classic “nuts” are obtained. On the lens, the depth of field is indicated for the values: 4, 8, 16, 22 and infrared offset. Aperture limits 1.4-22.0

Bokeh on SMC Pentax-M 1: 1,4 50mm

Bokeh on SMC Pentax-M 1: 1,4 50mm

3. The lens has a very large maximum aperture of F1.4, the lens is well suited for low light shooting. All lenses that have an even larger aperture, such as F1.2, are an order of magnitude more expensive, so F1.4-F2.0 is the best inexpensive option. A large aperture will allow take off.

4. The lens has a multi-clarity SMC (Super multi coating). This allows you to enhance the contrast, increase the resistance to flare. But still in the backlight, the contrast drops quite a bit and a veil appears.

Photo on SMC Pentax-M 1: 1,4 50mm

Photo on SMC Pentax-M 1: 1,4 50mm

5. The lens can be used full frame and crop. On a cropped Pentax matrix with crop factor 1.5, this lens has EGF at 75mm, which is quite suitable for photographing portraits. In principle, old optics, such as SMC Pentax-M 1: 1,4 50mm take for a leisurely artistic shooting, as modern, tricked autofocus versions are much more expensive. It is a pity that Pentax still does not have a single Full Frame camera to fully reveal the potential of the old film optics on a digital (at the time of writing, spring 2012).

6. Thread for light filter - 49mm. In general, I was very surprised that the SMC Pentax-M 1: 1,4 50mm is very, very small for such a large aperture.

Photo at Pentax-m 50mm F1.4 SMC

Photo at Pentax-m 50mm F1.4 SMC

7. Build quality is excellent... SMC Pentax-M 1: 1,4 50mm made in Japan is not a Chinese plastic. Considering that this model has not been released for a long time, and I shoot with it, and even get a good picture, it only says that the lens has a good margin of safety. In general, it is quite funny to use optics that are older than you, this prompts you to write a review more thoughtfully. The only pity is that the old optics are still very much a thing of the past, and only fans of the manual Pentax will read this review.

Pentax-m 50mm F1.4 SMC photo

Pentax-m 50mm F1.4 SMC photo

Sample photos on the SMC Pentax-M 1: 1,4 50mm Asahi OPT. CO., Japan

All photos were taken on camera. Pentax K10D, since the camera has a simplified KAF2 mount, the camera always “thought” that the lens constantly had an aperture of F1.4, so I had to shoot it on closed apertures in manual mode. All photos without processing, on-camera JPEG, reduced size to 1600 * 1200, data from EXIF.

Image quality:

Of course, everyone is interested in whether it is possible to photograph at F1.4 - it is possible, but the depth of field is very, very small. Apertures F1.4-F2.0 have a soft picture effect. Sharpness in the center of the frame is at F1.4 below average, quite suitable for portraits, I can't say that at 1.4-2.0 the sharpness is bad, but it also falls short of good. There is practically no vignetting on the cropped Pentax K10 matrix, the vignette disappears completely at F2.8. Excellent sharpness comes at F5.6-F8.0. The colors are excellent. The lens at open apertures has strong HA, disappear somewhere after F4.0. There is practically no distortion - that's why for portraits the lens on the crop is just right. The bokeh of the lens is very good at F1.4, but a little worse when closed due to the “nuts” in the bokeh. Still, I would like the sharpness on the open a little better, perhaps it's just my copy is not entirely successful.

Pentax-m 50mm F1.4 SMC DOF

Pentax-m 50mm F1.4 SMC DOF


The lens is quite difficult to get into sharpness. At 1.4, a very part of the inherent soft effect. But still, all Pentax users - I recommend trying the manual high-aperture SMC Pentax-M 1: 1,4 or something like threaded for example Takumar 55mm 1.8.

Pentax-m 50mm F1.4 SMC sample photo

Pentax-m 50mm F1.4 SMC sample photo

Catalog of modern Pentax lenses can look at this link.

All major versions of similar lenses Asahi Opt. Co., Takumar / Pentax:


  1. SMC PENTAX 1: 1.2 / 50 ASAHI OPT. CO., JAPAN (7/6, 20947, 1975-1984)
  2. SMC PENTAX-A 1: 1.2 50mm + black / silver 'SPECIAL' (7/6, 20987, 1984-2004)


  1. Super takumar 1: 1.4 / 50 Asahi Opt. Co., Lens made in Japan (8/6, 358, 1964-1966)
  2. Super takumar 1: 1.4 / 50 Asahi Opt. Co. Lens made in japan (7/6, 37800, 1965-1971)
  3. Super-Multi Coated TAKUMAR 1: 1.4 / 50 ASAHI OPT. CO., JAPAN (7/6, 37902, 1971-1972)
  4. SMC TAKUMAR 1: 1.4 / 50 ASAHI OPT. CO., JAPAN (7/6, 37908, 1972-1975)
  5. SMC PENTAX 1: 1.4 / 50 ASAHI OPT. CO., JAPAN (7/6, 20847, 1975-1977)
  6. SMC PENTAX-M 1: 1.4 50mm ASAHI OPT. CO., JAPAN (7/6, 20867, 1977-1984)
  7. SMC PENTAX-A 1: 1.4 50mm (7/6, 20887, 1984-1989)
  8. SMC PENTAX-F 1: 1.4 50mm (7/6, 20827, 1987-1991)
  9. SMC PENTAX-FA 1: 1.4 50mm (7/6, 20817, 1991-2018[?])
  10. HD PENTAX-D FA * 1: 1.4 50mm SDM AW (15/9, 21260, 2018->)


  1. SMC PENTAX-DA * 1: 1.4 55mm SDM (-, 9/8, 21790, 2008->)


  1. SMC PENTAX-M 1: 1.7 50mm ASAHI OPT. CO., JAPAN (6/5, 20877, 1977-1984)
  2. SMC PENTAX-A 1: 1.7 50mm (6/5, 20897, 1984-1989)
  3. SMC PENTAX-F 1: 1.7 50mm (6/5, 20837, 1987-1991)
  4. SMC PENTAX-FA 1: 1.7 50mm (6/5, 20907, 1991-2004)


  1. SMC PENTAX-DA 1: 1.8 50mm (6/5, 22177, 2012->)


  1. SMC PENTAX-M 1:2 50mm ASAHI OPTICAL CO. (5/5, 20677, 1979-1985)
  2. SMC PENTAX-A 1: 2 50mm (5/5, 20697, 1985-1998)


  1. Auto-takumar 1: 1.8 / 55 ASAHI OPT. CO. Lens made in japan (6/5, 1958-1962)
  2. Super takumar 1: 1.8 / 55 Asahi Opt. Co. Lens made in japan (6/5, 37106, 1965-1971)
  3. Super-Multi Coated TAKUMAR 1: 1.8 / 55 ASAHI OPT. CO., JAPAN (6/5, 37104, 1971-1972)
  4. SMC TAKUMAR 1: 1.8 / 55 ASAHI OPT. CO., JAPAN (6/5, 37108, 1972-1975)


  1. Auto-takumar 1: 2 f = 55mm Asahi Opt. Co., Japan (6/5, 34100, 1958-1959)
  2. Super takumar 1: 2 / 55 Asahi Opt. Co. Lens made in japan (6/5, 37103, 1962-1973)
  3. SMC TAKUMAR 1: 2 / 55 ASAHI OPT. CO., JAPAN (6/5, 37109, 1973-1975)

black-silver 2/58, 2.4/58, 1.9/55, 2.2/55:

  1. takumar 1: 2 f = 58mm (6/4, 1957-1958, M42)
  2. takumar 1: 2.4 f = 58mm (5/3, 1957-1958, M42)
  3. Auto-takumar 1: 1.9 f = 55mm (6/5, 1958-1959, M42)
  4. Auto-takumar 1:2.2/55 (6/5, 1961-1963, M42)

The names of the lenses in this list correspond exactly to the inscription with the lens name near the front lens (except for the serial number).

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SMC Pentax-M 1: 1,4 50mm Asahi OPT. CO., Japan excellent aperture fifty kopeck piece for K mount (for Pentax cameras). Using it, you can get very beautiful artistic photos, at a fully open aperture the lens has a slight soft effect, but at the same time wonderful bokeh. I recommend Pentax for DSLR cameras.

Material prepared Arkady Shapoval. Training/Consultations | Youtube | Facebook | Instagram | Twitter | Telegram.

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Comments: 71, on the topic: Review of the SMC Pentax-M 1: 1,4 50mm

  • Yura

    Please tell me if the focus indication lamp lights up when using SMC Pentax-M 1: 1.7 50 mm on the Pentax K10D

  • Goalkeeper

    I believe you will be happy. Using MF lenses makes me feel more involved in a result. Let me know how it goes with Pentax.

  • Pavlo

    I want to try out such a Pentax-M 1: 1,7 50mm Asahi lens on the Nikon d700.
    Is such a crossroads safer without interruption and is it possible to know the macro?

  • Alexander

    Which is better (from the point of view of the picture) to take Super-Takumar 50 / 1.4 Pentax 50 / 1.4?
    Thank you!

    • Carl Zeiss

      Better to take Pentax of course! And even better than him, only the "K" series.

  • a guest

    Hello, I've been trying to find a lens for portrait and art photography for a week now, the Fujifilm X-T10 camera with a whale lens.
    He is obsessed with sharpness and bokeh, before that he photographed on kenon with Soviet lenses such as Helios 44m, Industar 61ls, Jupiter 37a. Please advise something that is not expensive $ 50-150, which ideally combines sharpness on an open hole, on infinity, and bokeh. I looked closely at the Japanese, but honestly I was already confused. I would be grateful for a couple of three standing lenses in response.
    Thank you

    • a guest

      By the way, the adapter is currently on the m42

      • anonym

        Olympus OM-System Zuiko Auto-S 50mm f / 1.8 or 85 2. but it is more expensive.

    • Yarkiy

      I understand that the answer is not the topic, but given your requests, you needed a Nikon 5300 with a Nikon AF-S 50mm 1: 1.8G

      • zengarden

        Almost any manual lens can be mounted on a mirrorless mirror, unlike Nikon.
        In Fuji, of course, native glass is better, but their price ...

        > Please advise something not expensive $ 50-150, in which the sharpness on an open hole, to infinity, and bokeh were ideally combined.

        You set mutually exclusive requirements :) use what you have so far and think what exactly you are missing - or sharpness in the open, or bokeh, or money.

    • Rodion

      On the BZK try OKS-1-50-1, RO-3-3M.

  • Nastya

    Good afternoon!
    Recently I bought such a lens + Pentax ME Super camera as a gift. I wanted to put on the lens right away, but I just can’t remove the back cover from the lens. ((Tell me, please, this may not be the case, and do you need to perform some special manipulations, and not just unscrew it clockwise? Before with Pentax technology did not contact.

    • Carl Zeiss

      Need to unscrew. Only not clockwise, but counterclockwise.

  • ZiNTeR

    Arkady, hello. I read about your "misadventures" with the aperture: the fact is that modern Pentax cameras have a parameter: recognition of the aperture values ​​from the lens ring. For manual optics, you just need to turn it on in the settings (by default it is turned off), and then the camera will “understand” the aperture.
    By the way, Pentax is also unique in that it has a green button - it is made in essence for manual optics. By pressing it, the system calculates the desired parameters for shooting, and sets them in the camera. Thus, through the green button, manual shooting occurs almost at the speed of automatic mode :)

    • Alexander

      Dear ZiNTeR, thank you very much for the information about the green button!) I bought a PentaxK200D with a manual 50mmf2 lens a few months ago and constantly first turned on the aperture priority, “caught” the exposure, switched to manual and lengthened the shutter speed the required number of stops. Thanks to you, everything has been simplified many times!))))

  • Eugene

    For some reason, everyone has forgotten the topic of radioactivity in old Japanese optics. In this review, she is also ignored. Why, in my opinion, do not forget about this? I remembered how once all day I wore a Konica Hexanon AR 57mm F1.2 lens (it draws great, I took it from the seller for testing). Towards evening I noticed that I constantly scratched my leg in the same place (as I later realized, this lens was in the bag opposite). Guessed to measure his radiation background. It amounted to more than 600 microroentgen per hour (norm 20). The lens was returned to the seller.
    Why am I writing about it here. As I understand it, the SMC Pentax-M is the reincarnation of Super-tumors that are lit up as the 4th unit of the Chernobyl nuclear power plant.

    • Onotole

      Revelations of a young radiophobe)))
      I'll tell you a little secret - radiation does not itch)))) Moreover, such microscopic doses as 600 microroentgens))) Otherwise, during a flight in airplanes with their 200-300 microroentgens per hour, (and even not a background somewhere locally, near the foot, and absolutely everywhere permeates the entire fuselage and everyone who is in it) would make everyone disappear into the blood. Especially 10-11 hour transatlantic flights, passing at an elevated altitude up to 13000 meters)))
      Probably, then they also drank iodine for 2 months to "remove the radiation"?

    • KalekseyG

      ))))))))) This is generally beyond description. Scabies from gamma radiation))))))))

  • anonym

    troll in vain, on the street the norm is 15 microdistrict (usually), in rooms 20, 25 (a little more is possible), but 600 microdistrict is ten times more than the norm, radiation does not have a color of taste smell, but nevertheless a person can do something an unpleasant feeling, my father had a work colleague, asked for a dosimeter, at home to check it, he came running scared, the device went off scale, my father went to see what was going on, already on the doorstep, and in the apartment in general ... it turned out they bought shoes, and under the buckle, tape, a plate of size with a fingernail ... it turned out to be an isotope of cobalt, they lay well for 2-3 days, they had not yet been worn ... but the owner felt something unpleasant (this plate was naturally in the enterprise, for special storage) these were the 90s, then Yeltsin issued a decree (on the subject of radiation ), so my father was doing this, a helicopter flew over the city, a car with special equipment drove, spotted where what, then on foot ... he found a lot of things, including paint, tow, etc. now pretty much everything is cleaned up

    • Onotole

      You read your text yourself - where are 600 microroentgens and where “the device has gone off scale even on the threshold”, is there a difference ??? At ultra-high radiation intensities, there may indeed be specific sensations, in particular, metal taste in the mouth, diarrhea, but this occurs at radiation levels that can quickly lead to lethal consequences.

  • anonym

    Onotole, dear, I just brought a case ... but 600 md is still a lot

  • Mark

    Tell me, I want to put SMC Pentax-K 50 1.4 or SMC Pentax-M 50 1.4 on Canon through an adapter.
    Who tried? What kind of adapter do you need? such?

    • Arkady Shapoval

      Yes, such

  • Fedorov Andrey

    please enlighten who knows whether such a lens is radioactive or not? and even want, and scary

    • Rodion


    • Vitaly N

      Take a dosimeter somewhere and measure for the sake of interest what is next to you: a stone corner, granite, crushed stone, marble ... You don’t wear it in panties, but a little fonite is all around. For example, the background of a coal-fired thermal power plant is higher than that of a nuclear power plant.

  • Fedorov Andrey

    Enlighten, please, is there a fundamental difference between SMC Pentax-M 1.7 and SMC Pentax-M 1.4? will there be a gap between them in aperture? I want to know not to buy an extra lens? thanks in advance for your reply

    • R'RёS,R ° F "RёR№

      Of course very late. Probably, but I will prompt. There is not much difference. Another thing is that 1.4 Pentax is a bit better in sharpness. However, I was sitting on the pentax for a long time and when I needed to shoot on slides indoors (it was a long time ago) I chose Olympus 1.4 of the latest versions. The Pentax 1.4AF follows him, and the Pentax vaunted Zeiss 1.4 then the rest. Now digital devices can shoot code even under a blanket, the criteria for aperture ratio only in the background blur and all. Here it is necessary to select. If on the crop, then some cheap staffers 50mm / 2.0 are quite suitable. What do they have a nice drawing and do not overpay for money.

  • Kateryna

    hello ... help, I didn't know, and even got confused:) I have a Pentax 6 × 7 carcass, I want to buy a lens, but I still don't understand if SMC PENTAX 50mm F 1,4 is suitable ... ..without any letter marking .. this is what a bayonet ... K, M ... for the first time I come across the Pentax technique and I don't want to buy an unsuitable lens for the carcass ... :(

    • B. R. P.

      Pentax 6 × 7? Film medium format camera? Then this lens is definitely not suitable for you. As a standard on this camera, non-autofocus 105mm 2,4 is used. And by the way, the camera is also not autofocus.

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