T a k u m a r 1 : 5 f = 500 mm Model I (Asahiflex f=16 M42 1957)
T a k u m a r 1 : 5 f = 500 mm or T a k u m a r 1 : 5 500 mm Model II (Asahi Pentax f=22)
Produced May 1958 to 1965. Serial Number range 149xxx - 1397xxx. Model II AOCo Product No.326 (43260). Honeywell Pentax Cat.No.730. Updated April 2025.
T a k u m a r 1 : 5 f = 500 mm or T a k u m a r 1 : 5 500 mm Model II (Asahi Pentax f=22)
Produced May 1958 to 1965. Serial Number range 149xxx - 1397xxx. Model II AOCo Product No.326 (43260). Honeywell Pentax Cat.No.730. Updated April 2025.
(Research Note: Model I. Since 2010 I have seen 3.03% (6 copies) of the total estimated 200 copies made. SN 149xxx - 159xxx.)
(Research Note: Model II. Since 2010 I have seen 2.97% (76 copies) of the total estimated 2,500 copies made. See below.)
(Research Note: Model II. Since 2010 I have seen 2.97% (76 copies) of the total estimated 2,500 copies made. See below.)
INTRODUCTION
Two early Takumar models were sold. An outstanding (f=16) version was produced for Asahiflex cameras in 1955 with the name "Asahi-Kogaku". Final copies fitted with M42 mounts were used to supply early demand for the Asahi Pentax in 1957.
The Asahiflex lens was replaced by the new all black Model II (f=22) specifically designed for Asahi Pentax cameras with the new name "Asahi Optical Co". This all black model went into production immediately after the Takumar 1: 4/300mm in 1958.
Both 500mm models have built-in hoods. Attachments for M42 mount cameras differ and are not interchangeable. The early lens has a three prong attachment and the later one has four prongs.
Two early Takumar models were sold. An outstanding (f=16) version was produced for Asahiflex cameras in 1955 with the name "Asahi-Kogaku". Final copies fitted with M42 mounts were used to supply early demand for the Asahi Pentax in 1957.
The Asahiflex lens was replaced by the new all black Model II (f=22) specifically designed for Asahi Pentax cameras with the new name "Asahi Optical Co". This all black model went into production immediately after the Takumar 1: 4/300mm in 1958.
Both 500mm models have built-in hoods. Attachments for M42 mount cameras differ and are not interchangeable. The early lens has a three prong attachment and the later one has four prongs.
DESCRIPTION
VARIATION
- Copies in later batches have red IR mark in DOF gauge.
NOTES
- Early brown leather cases for both Asahiflex and Asahi Pentax lenses were supplied with leather carry straps.
LENS PRODUCTION (∑ lenses) ∑n = 76 Serial Numbers (SN) observed in 34 batches covering 425 SN min.< ∑ lenses <4,698 SN max.
SN min. = accumulated total of serial numbers observed within 34 batches
SN max. = accumulated total of serial numbers observed between adjacent batches of other lenses.
Two versions ▼ SN prefix "No."▲. ▼▼ Model I Converted Asahiflex (M37 with f=16) to M42 ▲▲. ▼▼▼ Model II M42 with f=22 ▲▲▲
SN min. = accumulated total of serial numbers observed within 34 batches
SN max. = accumulated total of serial numbers observed between adjacent batches of other lenses.
Two versions ▼ SN prefix "No."▲. ▼▼ Model I Converted Asahiflex (M37 with f=16) to M42 ▲▲. ▼▼▼ Model II M42 with f=22 ▲▲▲
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T a k u m a r 1 : 5 f = 500 mm Model I f=16 ▼/▼▼ 149112 (1/ 1) 151921 (1/ 1) 157005 (1/ 1) 159393 to 159407 (3/ 14) ▲▲/▼▼▼ T a k u m a r 1 : 5 / 500 mm Model II f=22 1700xx to 170034 (2/ 2) 184593 (1/ 1) 193416 to 193421 (2/ 5) 196846 to 196872 (4/ 26) 209284 (1/ 1) ▲ |
Serial Numbers in 34 Batches (n /SN range) Collection 350984 (1/ 1) 354995 (1/ 1) 416547 to 416548 (2/ 2) 420811 (1/ 1) 424818 (1/ 1) 461178 to 461195 (2/ 17) 473983 to 473987 (2/ 4) 490946 (1/ 1) 550316 to 550324 (2/ 8) 613817 to 613844 (5/ 27) 619515 (1/ 1) 642185 to 642220 (3/ 35) 668385 (1/ 1) 705630 to 750692 (8/ 62) 759102 to 759113 (3/ 11) |
816006 to 816015 (3/ 9) 819541 (1/ 1) 872857 to 872887 (2/ 30) 902178 (1/ 1) 919528 to 919539 (2/ 11) 946488 to 946491 (2/ 4) 43660 SN starts 95582x (1/ 1) 967541 to 967589 (4/ 48) 986880 to 986929 (4/ 49) 997800 (1/ 1) 1001049 (1/ 1) 1051607 to 1051636 (4/ 32) 1344943 to 1344972 (4/ 29) 1397429 (1/ 1) spare bezel only ▲▲▲ |
