SMC PENTAX-FA 1: 1.7 50mm

Main technical characteristics of SMC PENTAX-FA 1:1.7 50mm:

Name	SMC PENTAX-FA 1: 1.7 50mm
Basic properties	SMC (Super Multi Coated) - special super-multi coated optics FA – range of auto focus lenses Bayonet mount Pentax K aperture control ring lens suitable for full-frame cameras compact sizes 20907 – lens model marker
Front Filter Diameter	49 mm, metal thread for filters
Focal length	50 mm On Pentax cameras with APS-C sensor EGF lens equals 75mm
Zoom ratio	1 x
Designed by	for film cameras with a frame size of 24 x 36 mm
Number of aperture blades	6 petals
Tags	window with a scale of focusing distance in meters and feet depth of field scale for f / 8, 16, 22 red label for working in the infrared spectrum red bayonet attachment point (on the side of the bayonet tabs) the letter 'A' on the iris control ring to switch to automatic mode aperture ring release button
Diaphragm	F / 1.7 to F / 22
MDF	0.45 m, maximum magnification ratio 1: 6.7.
The weight	170 grams
Optical design	6 elements in 5 groups The lens does not use special optical elements in its optical design. The same optical design is used by other lenses of the class Pentax 50 / 1.7.
Lens hood	Threaded, screwed into the front filter thread
Manufacturer country	JAPAN (lens made in Japan)
Period	From 1991 to 2004, no direct sequel.
Price	About 150 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.