SMC PENTAX-A 1:1.2 50mm Special

SMC PENTAX-A 1:1.2 50mm Special

SMC PENTAX-A 1:1.2 50mm Special

Name on the body SMC PENTAX-A 1:1.2 50mm Special
Basic properties
  • Pentax K - K mount
  • manual focus only
  • aperture control ring
  • A – the ability to automatically control the aperture (only with some cameras)
  • mode lock button 'A'
  • SMC (Sopera-Multi-Coated) - multi-layer optical coating
  • lens suitable for full-frame cameras
  • Special - a special version of the lens for Pentax LX 2000 cameras, only 1000 copies were produced.
Front Filter Diameter 52 mm, metal thread for filters
Focal length 50 mm
Zoom ratio 1 X (this is a fixed lens, it does not have a zoom).
Designed by for film cameras with a frame size of 24 x 36
Number of aperture blades 9 petals. Petals dark matte
Tags
  • focusing distance scale in meters and feet, both black. There are marks for infinity, 10, 5, 3, 2, 1.5, 1.2, 1, 0.8, 0.7, 0.6, 0.5, 0.45 meters + marks 1.5, 1.75, 2, 2.5, 3, 4, 5, 7, 10, 15 , 30 ft.
  • depth of field scale for F / 4, 5.6 (not explicitly), 8, 11 (not explicitly), 16, 22
  • red line-label for working in the infrared spectrum
  • green convex dot mark for easy lens orientation
  • green letter “A” with an angle icon to set the position of the automatic iris control
  • red dot for mounting the bayonet on the side of the bayonet tabs
Diaphragm from f / 1.2 to f / 22.

The lens has an aperture control ring. Manual or automatic iris control is possible (this function must be supported by certain cameras).

The ring has markings for F/1.2, 2, 2.8, 4, 5.6, 8, 11, 16, 22 + an “A” mark for fully automatic aperture control (only supported by some Pentax K mount cameras)
MDF 0.45 meters, maximum magnification ratio 1:6.7
The weight 345 grams
Optical design 7 elements in 6 groups

smc-pentax-af-1-2-50mm-lens-optical-designThe lens does not use special optical elements in its optical design.

The same optical scheme is used by lenses:
Lens hood Threaded, screwed into the thread of the front light filter.
Manufacturer country JAPAN (inscription on the body, the lens is made in Japan)
Period A batch of 1000 copies was released in July 2000. The batch was produced for the Pentax LX 2000 camera. This lens has no logical continuation.
Price About 4000 cu for used option.

Appearance

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

1.2/50

  1. SMC PENTAX 1: 1.2 / 50 ASAHI OPT. CO., JAPAN (7/6, 20947, 1975-1984)
  2. SMC PENTAX 1:1.2/50 ASAHI OPT. CO.,JAPAN'GOLD' (7/6, 1981)
  3. SMC PENTAX-A 1: 1.2 50mm (7/6, 20987, 1984-2004)
  4. SMC PENTAX-A 1: 1.2 50mm Special (7/6, 2000)

1.4 / 50 (video)

  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, F/2 in number)
  3. Super takumar 1: 1.4 / 50 Asahi Opt. Co. Lens made in japan (7/6, 37801, 1965-1971, F/2 dot)
  4. Super takumar 1: 1.4 / 50 Asahi Opt. Co., Lens made in Japan (7/6, 37802, 1965-1971, comma after 'CO.')
  5. Super-Multi Coated TAKUMAR 1: 1.4 / 50 ASAHI OPT. CO., JAPAN (7/6, 37902, 1971-1972)
  6. SMC TAKUMAR 1: 1.4 / 50 ASAHI OPT. CO., JAPAN (7/6, 37908, 1972-1975)
  7. SMC PENTAX 1: 1.4 / 50 ASAHI OPT. CO., JAPAN (7/6, 20847, 1975-1977)
  8. SMC PENTAX-M 1: 1.4 50mm ASAHI OPT. CO., JAPAN (7/6, 20867, 1977-1984)
  9. SMC PENTAX-A 1: 1.4 50mm (7/6, 20887, 1984-1989)
  10. SMC PENTAX-F 1: 1.4 50mm (7/6, 20827, 1987-1991)
  11. SMC PENTAX-FA 1: 1.4 50mm (7/6, 20817, 1991-2023)
  12. HD PENTAX-D FA * 1: 1.4 50mm SDMAW (15/9, 21260, 2018->)
  13. SMC PENTAX-FA 1: 1.4 50mm Classic (7/6, 2023->)
  14. HD PENTAX-FA 1: 1.4 50mm (7/6, 2023->)

1.8 / 55 (video)

  1. takumar 1:1.8 f=55mm Asahi OPT. CO., Japan (6/5, 1958, zebra)
  2. Auto-takumar 1:1.8 f=55mm Asahi OPT. CO., Japan (6/5, 1958-1960, zebra)
  3. Auto-takumar 1:1.8/55 ASAHI OPT. CO., Lens made in Japan (6/5, 1960, with 'R')
  4. Auto-takumar 1:1.8/55 ASAHI OPT. CO., Lens made in Japan (6/5, 1960-1962, no 'R', oblique lines of the depth of field)
  5. Auto-takumar 1:1.8/55 ASAHI OPT. CO., Lens made in Japan (6/5, 1962, no 'R', straight lines of depth of field)
  6. Super takumar 1: 1.8 / 55 Asahi Opt. Co., Lens made in Japan (6/5, 1962, fine ribs, f/1.8 left)
  7. Super takumar 1: 1.8 / 55 Asahi Opt. Co., Lens made in Japan (6/5, before 1965, fine ribs, f/1.8 right)
  8. Super takumar 1: 1.8 / 55 Asahi Opt. Co. Lens made in japan (6/5, 37106, before 1971, large ribs)
  9. Super-Multi Coated TAKUMAR 1: 1.8 / 55 ASAHI OPT. CO., JAPAN (6/5, 37104, 1971-1972)
  10. SMC TAKUMAR 1: 1.8 / 55 ASAHI OPT. CO., JAPAN (6/5, 37108, 1972-1975)
  11. SMC PENTAX 1: 1.8 / 55 ASAHI OPT. CO., JAPAN (6/5, 20747, 1975-1977)

2 / 55 (1.9 / 55)

  1. Auto-takumar 1:1.9 f=55mm Asahi Opt. Co.,Japan (6/5, 1958-1959)
  2. Auto-takumar 1: 2 f = 55mm Asahi Opt. Co., Japan (6/5, 1958-1959, zebra)
  3. Auto-takumar 1: 2 f = 55mm Asahi Opt. Co., Japan (6/5, 34100, 1958-1959)
  4. Super takumar 1: 2 / 55 Asahi Opt. Co., Lens made in Japan (6/5, small fins, F/2 left)
  5. Super takumar 1: 2 / 55 Asahi Opt. Co., Lens made in Japan (6/5, small ribs, F/2 on the right)
  6. Super takumar 1: 2 / 55 Asahi Opt. Co. Lens made in japan (6/5, 37103, 1962-1973, large ribs)
  7. Super takumar 1: 2 / 55 Asahi Opt. Co. Lens made in japan (6/5, 37107, additional aperture pins)
  8. SMC TAKUMAR 1: 2 / 55 ASAHI OPT. CO., JAPAN (6/5, 37109, 1973-1975)
  9. SMC PENTAX 1: 2 55mm ASAHI OPT. CO., JAPAN (6/5, 1976-1977)

1.7/50

  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)

2/50

  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)

2.2/55

  1. takumar 1:2.2/55 Asahi Opt. CO., Japan (6/5, 1961-1963)
  2. Auto-takumar 1:2.2/55 ASAHI OPT. CO., Lens made in Japan (6/5, 1961-1963)

2/58

  1. takumar 1:2 f=58mm Asahi Opt. Co., Japan (6/4, 1957-1958)
  2. takumar 1: 2 f = 58mm Asahi Opt. Co., Japan (6/4, 1957-1958, labeled 'R')

DA (APS-C: 1.4/55 DA* + 1.8/50 DA)

  1. SMC PENTAX-DA * 1: 1.4 55mm SDM (9/8, 21790, 2008->)
  2. SMC PENTAX-DA 1: 1.8 50mm (6/5, 22177, 2012->)

Asahi-Kogaku (M37x1, 3.5/50 + 2.4/58 -> M42)

  1. takumar 1: 3,5 f = 50mm Asahi-kogaku (4/3, 1952, M37×1)
  2. takumar 1: 3.5 f = 50mm Asahi-kogaku (4/3, 1952, , M37×1, pre-set)
  3. takumar 1: 2.4 f = 58mm Asahi-kogaku (5/3, 1954, M37×1, silver)
  4. takumar 1: 2.4 f = 58mm Asahi Opt. Co., Japan (5/3, 1957-1958, M42)

The lens names in this list correspond exactly to the lens name label on the lens barrel (except for the serial number and/or filter diameter).

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

03.07.2023 | News Email | VK | FB | Google+ | Twitter | Youtube

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Comments: 5, on the topic: SMC PENTAX-A 1:1.2 50mm Special

  • Yuri
    05.09.2023 in 09: 45 Reply

    With aperture 1,2 and manual focus, it's very hard to hit the focus point. Even despite the working autofocus confirmation function, for manual lenses, in modern cameras. More or less, you can only shoot with top-end cameras from Sony, with an adapter.
    And so, the picture at 1,2 is of course wonderful. The bokeh is very soft and watercolor-like. The color is rich and natural.
    At a fully open aperture, contrast leaves much to be desired. Sharpness is good. But 1 out of 20 frames hits the focusing point. Therefore, for portraits you will have to cover it up. And for creative shooting completely open, this is an excellent glass.

    • Nicholas
      05.09.2023 in 10: 49 Reply

      On a UPC with focus picking, it’s not difficult, but very simple.
      I shoot on bzk fuji and nikon.
      In fact, bzk gave a second life to manual lenses. It was really not easy to shoot on DSLRs, even with confirmation or with an increase through live view. I used to have a Pentax K3, so with it, even with autofocus like 55 / 1.4, there was a lot of marriage in focus.
      If not very dynamic scenes, then there is not so much marriage in focus, especially if you fill your hand.

    • Arkady Shapoval
      05.09.2023 in 15: 02 Reply

      More than once I shot at real 0.95, in general there are no problems with modern bzk.

      • Rodion
        05.09.2023 in 17: 49 Reply

        It all depends very much on the correction (its degree and method) of the lens. Picking will not work equally well with all glasses with equal parameters.

        • Arkady Shapoval
          05.09.2023 in 19: 07 Reply

          you can even shoot without picking, even on a mirror pentaprism

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