smc Pentax-A 100mm F/4 Macro

Macro lens • Film era • Discontinued

  • Announced:
  • · August 1984
  • Production status:
  • ● Discontinued
  • Country of design:
  • · Japan
  • Original name:
  • · SMC PENTAX-A MACRO 1:4 100mm
  • Class:
  • · Slow full-frame macro 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.
A A manual focus lens with automatic maximum aperture indexing and automatic aperture control. Learn more
MACRO Macro lens. Designed specially for shooting close-ups of small subjects but can be also used in other genres of photography, not necessarily requiring focusing at close distances. Learn more

Model history (4)

■Asahi Super-Multi-Coated Macro-Takumar 100mm F/4 [43922] • 1:2A5 - 30.45m⌀49 1972 ●
■smc Pentax 100mm F/4 Macro • 1:2A5 - 30.45m⌀52 1975 ●
■smc Pentax-M 100mm F/4 Macro • 1:2A5 - 30.45m⌀49 1977 ●
■smc Pentax-A 100mm F/4 Macro • 1:2A5 - 30.45m⌀49 1984 ●

Specification

Optical design:
35mm full frame
100mm
F/4
5 elements in 3 groups (Cooke triplet derivative)
Pentax K [45.5mm]
24.4° (35mm full frame)
On Pentax K APS-C [1.53x] cameras:
35mm equivalent focal length:
153mm (in terms of field of view)
35mm equivalent speed:
F/6.1 (in terms of depth of field)
Diagonal angle of view:
16.1°
Diaphragm mechanism:
Diaphragm type:
Automatic
Aperture control:
Aperture ring (Manual settings + Auto Exposure setting)
6 (six)
Focusing:
0.45m
1:2
Focusing modes:
Manual focus only
Manual focus control:
Focusing ring
Physical characteristics:
340g
⌀65×78mm
Accessories:
Screw-type 49mm
Not required
<No data>

Sources of data

  • Manufacturer's technical data.
  • Pentax lenses & accessories booklet (December 1986).
  • Pentax A3 booklet (PUB. 08061) (January 1985).
  • Pentax cameras booklet (PUB. 06091, 40 pages) (March 1987).
  • Pentax SLR cameras booklet (PUB. 050101) (September 1988).

Pentax-A series

The third generation of lenses designed for Pentax 35mm SLR cameras with bayonet mount. Introduced with the Pentax super A in 1983.

  • Robust, all-metal design with recessed focusing distance scale;
  • Fully automatic diaphragm;
  • Support for TTL open-aperture metering;
  • Electronic contacts for transmission of aperture information;
  • "A" setting on the aperture ring for automatic aperture control in the Programmed AE and Shutter-priority AE modes;
  • Extremely accurate manual focusing with rubberized focusing ring;
  • Multi-layer anti-reflection coating.

Other macro lenses in the Pentax K system

■Pentax K mount (8)
smc Pentax 50mm F/4 Macro • 1:2A4 - 30.23m⌀52 1975 ●
smc Pentax-M 50mm F/4 Macro • 1:2A4 - 30.23m⌀49 1977 ●
smc Pentax-A 50mm F/2.8 Macro • 1:2A6 - 40.24m⌀49 1983 ●
smc Pentax 100mm F/4 Macro • 1:2A5 - 30.45m⌀52 1975 ●
smc Pentax 100mm F/4 BellowsM5 - 3⌀52 1975 ●
smc Pentax-M 100mm F/4 Macro • 1:2A5 - 30.45m⌀49 1977 ●
smc Pentax-A 100mm F/2.8 Macro • 1:1A7 - 70.31m⌀58 1985 ●
smc Pentax-A* 200mm F/4 ED Macro • 1:1A10 - 90.55m⌀58 1986 ●

Lenses with similar focal length

■Pentax K mount (15)
Cosina 100mm F/3.5 MC Macro • 1:2
akaPhoenix 100mm F/3.5 Macro
akaPromaster Spectrum 7 100mm F/3.5 MC Macro
akaSoligor 100mm F/3.5 MC Macro
akaVivitar 100mm F/3.5 MC Macro		A5 - 40.43m⌀49 ●
Kino Precision Kiron 105mm F/2.8 MC Macro • 1:1A6 - 60.35m⌀52 1984 ●
Venus Optics Laowa CA-Dreamer 100mm F/2.8 APO Ultra Macro F / K • 2:1M12 - 100.25m⌀67 2019 ●
Panagor Auto 90mm F/2.8 PMC Macro • 1:1A6 - 40.35m⌀62 ●
Ricoh Rikenon P 100mm F/3.5 Macro • 1:2A5 - 40.43m⌀49 ●
Ricoh Rikenon P 105mm F/2.8 Macro • 1:1A6 - 60.35m⌀52 1985 ●
Sigma MF 90mm F/2.8 Multi-Coated Macro ZEN • 1:2A9 - 90.32m⌀52 1988 ●
Soligor C/D 90mm F/2.5 MC Macro • 1:1A6 - 50.35m⌀62 ●
Spiratone Proxitel 90mm F/2.5 Macro • 1:1A6 - 50.35m⌀62 1985 ●
Tokina AT-X 90mm F/2.5 Macro • 1:2A8 - 70.39m⌀55 1983 ●
Vivitar Series 1 90mm F/2.5 VMC Macro (s/n 37xxxxxx) • 1:2A8 - 70.39m⌀58 1975 ●
Vivitar Series 1 Telephoto 105mm F/2.5 VMC Macro (s/n 22xxxxxx) • 1:1A6 - 60.35m⌀52 1989 ●
Vivitar Auto Telephoto 90mm F/2.8 Macro (s/n 28xxxxxx) • 1:1A6 - 40.35m⌀62 1976 ●
Vivitar Telephoto 90mm F/2.5 MC Macro (s/n 28xxxxxx) • 1:1
akaElicar V-HQ 90mm F/2.5 MC Macro
akaRokunar V-HQ 90mm F/2.5 MC Macro		A6 - 50.35m⌀62 1986 ●
Vivitar Telephoto 100mm F/2.8 MC Macro (s/n 22xxxxxx) • 1:1A6 - 60.35m⌀52 1986 ●
■Interchangeable mount (6)
Heinz Kilfitt Munchen Makro-Kilar 90mm F/2.8
akaZoomar Muenchen Macro-Kilar 90mm F/2.8
akaZoomar Muenchen Macro-Zoomatar 90mm F/2.8		P4 - 3-- 1956 ●
Sigma[-XQ] MF 100mm F/2.8 Multi-Coated Macro [YS] • 1:1A7 - 50.33m⌀62 1972 ●
Tamron SP 90mm F/2.5 MC Tele Macro 52B [Adaptall-2] • 1:2A8 - 60.39m⌀49 1979 ●
Tamron SP 90mm F/2.5 Macro 52BB [Adaptall-2] • 1:2A8 - 60.39m⌀55 1984 ●
Tamron SP 90mm F/2.8 Macro 72B [Adaptall-2] • 1:1A10 - 90.29m⌀55 1996 ●
Sima SF 100mm F/2 Soft Focus + Macro [T] • 1:1.5--1 - 10.41m-- 1981 ●

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