smc Pentax-M* 300mm F/4

Super telephoto prime lens • Film era • Discontinued

  • Announced:
  • · April 1981
  • Production status:
  • ● Discontinued
  • Country of design:
  • · Japan
  • Original name:
  • · ASAHI OPT. CO. SMC PENTAX-M* 1:4 300mm
  • Class:
  • · Slow full-frame super telephoto prime lens
  • · Professional model
  • System:
  • · Pentax K (1975)

Abbreviations

SMC Multi-layer anti-reflection coating is applied to the surfaces of lens elements. This anti-reflection coating increases light transmission, eliminates flare and ghosting, and maintains color consistence among all lens models.
* Professional lens with high quality optics and robust build. Meets the highest standards and provides excellent performance and flawless image quality unachievable with traditional optical technologies.
M A manual focus lens with automatic maximum aperture indexing, which is a mechanical system for coupling the lens to the camera's exposure system. More compact and lighter than the standard K-series counterpart, but with no sacrifice in quality of construction, resolution, durability or contrast. Learn more

Model history (10)

■Asahi Takumar 300mm F/4M3 - 37.50m⌀82 1958 ●
■Asahi Takumar 300mm F/4 [346, 43460]M4 - 45.50m⌀82 1962 ●
■Asahi Super-Takumar 300mm F/4 [43891, 43894]A5 - 55.50m⌀77 1965 ●
■Asahi Super-Multi-Coated Takumar 300mm F/4 [43892]A5 - 55.50m⌀77 1971 ●
■smc Pentax 300mm F/4A7 - 54.00m⌀77 1975 ●
■smc Pentax-M* 300mm F/4A8 - 74.00m⌀77 1981 ●
■smc Pentax-A* 300mm F/4A8 - 74.00m⌀77 1983 ●
■smc Pentax-F* 300mm F/4.5 ED [IF]A9 - 72.00m⌀67 1987 ●
■smc Pentax-FA* 300mm F/4.5 ED [IF]A9 - 72.00m-- 1991 ●
■smc Pentax-DA* 300mm F/4 ED [IF] SDMA8 - 61.40m⌀77 2008 ●

Specification

Optical design:
35mm full frame
300mm
F/4
8 elements in 7 groups
Pentax K [45.5mm]
8.2° (35mm full frame)
On Pentax K APS-C [1.53x] cameras:
35mm equivalent focal length:
459mm (in terms of field of view)
35mm equivalent speed:
F/6.1 (in terms of depth of field)
Diagonal angle of view:
5.4°
Diaphragm mechanism:
Diaphragm type:
Automatic
Aperture control:
Aperture ring (Manual settings only)
8 (eight)
Focusing:
4m
<No data>
Focusing modes:
Manual focus only
Manual focus control:
Focusing ring
Physical characteristics:
825g
⌀84×132mm
Accessories:
Screw-type 77mm
Built-in telescopic round
<No data>

Sources of data

  • Manufacturer's technical data.
  • smc Pentax-A lenses operating manual.
  • Asahi Pentax MX booklet (PUB. 06241) (March 1981).
  • Pentax MG booklet (PUB. 06221) (July 1983).
  • Pentax LX booklet (PUB. 06506) (April 1981).
  • Pentax cameras booklet (PUB. 06091, 32 pages).
  • Pentax lenses and accessories booklet (PUB. 06771) (April 1983).
  • Pentax lenses and accessories booklet (PUB. 08051).
  • Pentax lenses & accessories - A Comprehensive and Versatile Photographic System booklet.
  • Pentax ME Super booklet (PUB. 06726) (March 1981).

Manufacturer description #1

This lens is a compact 300mm f/4, measuring only 131.5mm in length. Handheld telephotography is easy with this telephoto. The effective use of low dispersion glass ensures crisp definition and excellent color rendition, superior to that of conventional 300mm lenses.

Manufacturer description #2

An entirely new generation telephoto lens utilizing low-dispersion glass for excellent correction of chromatic aberration and an ultra-compact design which not only makes it the smallest and most compact 300mm lens on the market, but opens up an entirely new range of handheld shooting possibilities from action sports to distant wildlife and beautiful soft-focus portraits.

Pentax-M series

The second generation of lenses designed for Asahi Pentax 35mm SLR cameras with bayonet mount. Introduced with Asahi Pentax ME and MX in 1976.

  • Miniaturized lenses with average 20% less weight and length than their standard SMC counterparts, but with no sacrifice in quality of construction, resolution, durability or contrast;
  • Robust, all-metal design with recessed focusing distance scale;
  • Fully automatic diaphragm;
  • Support for TTL open-aperture metering;
  • Extremely accurate manual focusing with rubberized focusing ring;
  • Multi-layer anti-reflection coating.

Other super telephoto prime lenses in the Pentax K system

■Pentax K mount (11)
smc Pentax 300mm F/4A7 - 54.00m⌀77 1975 ●
smc Pentax-A* 300mm F/4A8 - 74.00m⌀77 1983 ●
smc Pentax-A* 300mm F/2.8 ED [IF]A8 - 83.00m-- 1983 ●
smc Pentax 400mm F/5.6M5 - 58.00m⌀77 1975 ●
smc Pentax-M 400mm F/5.6A5 - 55.00m⌀77 1979 ●
smc Pentax-A 400mm F/5.6A7 - 62.80m⌀77 1984 ●
smc Pentax-A* 400mm F/2.8 ED [IF]A8 - 84.00m-- 1984 ●
smc Pentax 500mm F/4.5M4 - 410.00m-- 1975 ●
smc Pentax-A* 600mm F/5.6 ED [IF]A8 - 65.50m⌀112 1983 ●
smc Pentax 1000mm F/8M5 - 530.00m-- 1975 ●
smc Pentax-A* 1200mm F/8 ED [IF]A9 - 88.00m-- 1985 ●

Lenses with similar focal length

■Pentax K mount (8)
Ricoh XR Rikenon 300mm F/4.5 APOA8 - 62.50m⌀67 1982 ●
Sigma MF 300mm F/4 APO Tele Macro ZENA10 - 71.20m⌀77 1994 ●
Sigma MF 300mm F/4.5 APO Multi-CoatedA8 - 62.50m⌀67 1980 ●
Sigma[-Z] MF Pantel 300mm F/5.6 [Multi-Coated]A6 - 56.00m⌀62 1975 ●
Soligor G/S Tele-Auto 300mm F/4.5 MC (s/n 3xxxxxx)A5 - 54.00m⌀72 ●
Telezenitar-K APO 300mm F/4.5 MC
akaТЕЛЕЗЕНИТАР-К АПО 300mm F/4.5 МС		A7 - 63.00m⌀72 1988 ●
Tokina 300mm F/5.6 RMC
akaTokina SL 300mm F/5.6		A6 - 34.50m⌀58 ●
Vivitar Auto Telephoto 300mm F/5.6 (s/n 37xxxxxx)A5 - 36.00m⌀58 1975 ●
■Interchangeable mount (22)
Century Tele-Athenar 300mm F/3.2 IIM4 - 26.00mS.9 1977 ●
Hanimex Tele-Lens 300mm F/5.5 [T]P4 - ?8.00m⌀62 ●
Heinz Kilfitt Munchen Tele-Kilar 300mm F/5.6P4 - 23.00m⌀68 1948 ●
Heinz Kilfitt Munchen Pan-Tele-Kilar 300mm F/4
akaZoomar Muenchen Pan-Tele-Kilar 300mm F/4		P4 - ?⌀88 1956 ●
Meyer-Optik Gorlitz Orestegor 300mm F/4P5 - 43.60m⌀95 1967 ●
Pentacon 300mm F/4P5 - 43.60m⌀95 1971 ●
Sankyo Kohki Super-Komura 300mm F/5 [Unidapter Auto]A5 - ?5.50m⌀62 ●
Komuranon 300mm F/4.5 K·M·CA? - ?4.50m 1974 ●
Sigma[-XQ] MF Macrotel / Telephoto 300mm F/4 [Multi-Coated] [YS]A6 - 54.50m⌀77 1972 ●
Soligor Tele-Auto 300mm F/5.5 Type 1 (s/n 1xxxxxx) [T-4]A5 - 56.00m⌀62 ●
Soligor Tele-Auto 300mm F/5.5 Type 2 (s/n 1xxxxxxx) [T-4]A5 - 36.00m⌀62 ●
Tair-3A 300mm F/4.5 [T]
akaТАИР-3 300mm F/4.5 А		P3 - 32.20m⌀72 ●
Tair-1A APO 300mm F/4.5 [T]P5 - 52.25m 1972 ●
Steinheil Munchen Tele-Quinar 300mm F/4.5P5 - 33.00mS.IX 1956 ●
Tamron SP 300mm F/5.6 MC Tele Macro 54B [Adaptall-2]A6 - 51.40m⌀58 1979 ●
Tamron 300mm F/5.6 CT-300 [Adaptall]A4 - 42.50m⌀58 1976 ●
Tamron Auto 300mm F/5.6 [Adapt-A-Matic]A4 - 22.50m⌀62 1972 ●
Tamron 300mm F/5.6 [T]P4 - 23.50m⌀62 1962 ●
Tamron 300mm F/6.9 [T]
akaSoligor 300mm F/6.9		P3 - 26.00m⌀58 1963 ●
Vivitar Tele 300mm F/5.6 [T]P5 - 44.50m⌀62 ●
Vivitar Auto Telephoto 300mm F/5.5 (s/n 37xxxxxxx) [T-4]A5 - ?6.00m⌀62 1968 ●
Vivitar Auto Telephoto 300mm F/5.6 (s/n 37xxxxxx) [TX]A5 - 36.00m⌀58 1976 ●

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