360icon FotoGear | Adapted LensesAsahi Pentax Takumar m42

FotoGearLensAsahi Optical Company Japan m42

Asahi Takumar Lenses:

Fisheye • 17mm f4.0 Fisheye
Wide Angle • 20mm f4.0 24mm f3.5 28mm f3.5 35mm f3.5
Normal • 50mm f1.4 50mm SMC f1.4 55mm f1.8
Macro • 50mm f4.0 Macro Preset 100mm f4.0 Macro Extension Tubes 1.2.3
Portrait • 85mm 105mm 120mm
Telephoto • 135mm 150mm 200mm f3.5 200mm 5.6 300mm Preset 300mm 400mm Super Rare 500mm f5.0
Reflex Zoom • Rare Pentax 200-600mm f8-12

• Takumar Lenses Operating Manual Honeywell Pentax 1971 Honeywell Pentax 1973 Takumar Radioactive Lenses.pdf

• Takumar Fisheye


1 • Takumar Fisheye 17mm f4.0

• Production Year: 1972 • Field of View: 180° • Minimum Focus: 7.87" • f4.0-22 • Filter: Dial In: Red -Yellow- Orange- UV Filters
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• Takumar Wide



2 • Takumar 20mm f3.5

• Production Year: 1971 • Field of View: 94° • Minimum Focus: 7.87" • f3.5-16 • Filter: 72mm • Takumar Built In 20mm Hood
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3 • Takumar 24mm f3.5

• Production Year: 1972 • Field of View: 84° • Minimum Focus: 9.84" • f3.5-16 • Filter: 49mm • Takumar 24mm / 72mm Hood
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4 • Takumar 28mm f3.5

• Production Year: 1984 • Field of View: 75° • Minimum Focus: 15.74" • f3.5-22 • Takumar 28mm Hood
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5 • Takumar 35mm f3.5

• Production Year: 1971 • Field of View: 65° • Minimum Focus: 17.71" • f4.0-22 • Takumar 35mm Hood
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• Takumar Normal



6 • Takumar 50mm f 1.4

• Production Year: 1970 • Field of View: 47° • Minimum Focus: 17.71" • f4.0-22 • Takumar 50mm Hood
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7 • Super Takumar SMC 50mm f1.4

• Production Year: 1975 • Field of View: 47° • Minimum Focus: 17.71" • f1.4-16 • Takumar 50mm Hood
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8 • Takumar 55mm f1.8

• Production Year: 1971 • Field of View: 43° • Minimum Focus: 17.71" • f1.8-16 • Takumar 55mm Hood
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• Takumar Macro



9 • Takumar Macro 1:1 Preset 50mm f4.0

• Production Year: 1965 • Field of View: 47° • Minimum Focus: 8.26" • f4.0-22 • Takumar 49mm Hood
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10 • Takumar Macro 50mm f4.0

• Production Year: 1971 • Field of View: 24° • Minimum Focus: 9.05" • f4.0-22 • Takumar 49mm Hood
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11 • Takumar Macro 100mm f4.0

• Production Year: 1972 • Field of View: 24° • Minimum Focus: 17.71" • f4.0-22 • Takumar 100mm Hood
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• Takumar Portrait



12 • Takumar 85mm f1.9

• Production Year: 1970 • Field of View: 28.5° • Minimum Focus: 17.71" • f1.9-22 • Takumar 85mm Hood
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13 • Takumar 105mm f2.8

• Production Year: 1971 • Field of View: 23° • Minimum Focus: 33.46" • f2.8-22 • Takumar 105mm Hood
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14 • Takumar 120mm f2.8

• Production Year: 1972 • Field of View: 20° • Minimum Focus: 47.24" • f2.8-22 • Takumar 120mm Hood
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• Takumar Telephoto


15 • Takumar 135mm f3.5

• Production Year: 1971 • Field of View: 18° • Minimum Focus: 59" • f3.5-22 • Takumar 135mm Hood
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16 • Takumar 150mm f4.0

• Production Year: 1971 • Field of View: 16° • Minimum Focus: 70.86" • f4.0-22 • Takumar 150mm Hood
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17 • Takumar 200mm f3.5 - 200mm Preset

• Production Year: 1965 • Field of View: 12° • Minimum Focus: 8,2' • f3.3-22 • Takumar 200mm Hood
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18 • Takumar 200mm f5.6 - 200mm Preset - Extended 200mm Hood

• Production Year: 1970 • Field of View: 12° • Minimum Focus: 98.4" • f5.6-22 • Takumar 200mm Long Hood
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19 • Takumar 300mm Preset f4.0

• Production Year: 1985 • Field of View: 8.2° • Minimum Focus: 18.4' • f4.0-22 • Takumar 300mm Hood
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20 • Takumar 300mm f4.0

• Production Year: 1985 • Field of View: 8.2° • Minimum Focus: 18.4' • f4.0-22 • Built In Hood
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21 • Tele-Takumar 400mm f5.6

• Production Year: 1965 • Field of View: 6.2° • Minimum Focus: 24.4' • f5.6-22 • Built In Hood
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22 • Asahi Kogaku Takumar 500mm f/5 Model II with Cap and Case- Very Rare Collector Tier


The history of the 500mm Takumar series mirrors the evolution of the Asahi Optical Company (Pentax) from early innovative experimenter to a dominant force in multi-coated optical technologies.

Rarity Tier Breakdown
• Production Year: 1965 • Asahi Takumar 500mm f/5 (Model I - 1957): Extremely Rare (Museum Tier)
• Production Year: 1965 • Estimated Production: ~200 copies total.
• Production Year: 1965 • Context: Built during the transition from the Asahiflex to the modern M42 Pentax SLR system. Finding a surviving functional copy is exceptionally difficult; they reside almost exclusively in private collections.

• Production Year: 1965 • Asahi Takumar 500mm f/5 (Model II - 1958–1965): Very Rare (Collector Tier)
• Production Year: 1965 • Estimated Production: ~2,500 copies total.
• Production Year: 1965 • Context: According to historical data tracked by the Takumar Field Guide, only a tiny fraction of these have surfaced publicly on secondary markets over the last two decades. They appear for sale only a few times a year globally.

• The Blueprint (1955): Before the M42 universal screw mount became standard, Asahi introduced its first 500mm prime as an Asahi-Kogaku Takumar 500mm f/5 for the early Asahiflex M37 screw-mount camera.
• The Transition to M42 (1957–1958): With the birth of the first modern Asahi Pentax AP SLR camera, the company moved to the M42 thread mount. The final batches of the original \(f/5\) optics were adapted into M42 mounts.
• The Model II f/5 Era (1958–1965): Asahi launched the Model II f/5 variant under its updated name, Asahi Optical Co.. These early presets relied on a massive mechanical footprint and manual presets to cater to early sports and press photography.
• The f/4.5 Shift & Multi-Coating (1966–1975): In 1966, Asahi redesigned the system into a faster Takumar 500mm f/4.5 configuration. When Pentax pioneered its industry-changing 7-layer anti-reflective coatings in 1971, this lens was upgraded to the Super-Multi-Coated (SMC) Takumar 500mm f/4.5, dramatically cutting down the lens flare and internal reflections inherent to massive front glass elements.

• Production Year: 1959? • Field of View: 5° • Minimum Focus: 32.9' • f5.0-22 • Filters 95mm Front / 49mm Rear • Takumar Built In Hood
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• Rare Mirror Reflex Zoom


23 • Rare AOC Pentax K Reflex Zoom 400-600mm f8.0-12.0 PK

• Production Year: 1982 • Field of View: 6.2-4.1° • Minimum Focus: 9.8' • f5.6-22 • Pentax H-R67 67mm
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