The last observed serial number in the final batch of Super-Multi-Coated 28mm TAKUMARS (43872) in 1975 is SN

(Beyond are 11 observed single lenses of 11 different focal lengths with serial numbers from SN 8474600 to SN 9924577.)

Serial numbers of M42 lenses begin in 1957 at

Numbers available 1957-75 = (8419613-130000) =

(= ∑M42 + ∑gaps + ∑6x7) (because M42 and 6x7 share the same SN series)

= 7,636,884 + 410,262 + ∑6x7

And; 8,289,613=7,636,884 + 410,262 + ∑6x7. So; ∑6x7 =

*Approximately

(A second method; adding early estimates of totals in

*Approximately

These kinds of estimates, based on observations, largely satisfy questions I set out to answer. They are as precise as most could need. There now exists a (still growing) list of 5,220 batches showing the order of production of, and numbers of each lens model made in each batch. It’s an archive for anyone interested in this history.

Now I intend to gather less numerical data on lenses and to work on their physical aspects.

Droo]]>

Standard and common focal length lenses comprised 90% of copies (table). After 50-60 yrs. many surviving/preserved lenses are used and traded keenly, especially pre-1965 types; relative to production estimates. Frequency lists in Takumar Field Guide suggest that all standard models from 1966 forward (see green shading) are numerically under-represented in current markets. | Standard lenses 135mm 28mm 35mm 200mm 105mm Macro 50mm 300mm 24mm | 4,210,030 865,500 545,500 536,200 413,000 178,800 114,000 77,800 66,800 | 54.84% 11.27% 7.11% 6.98% 5.38% 2.33% 1.48% 1.01% 0.87% |

Five common non-standard lenses are similarly under-represented; the final Super-Takumar 3.5/135mm introduced in 1965 and four Super-Multi-Coated Takumars introduced in 1971 (in order of production estimates; 135mm, 28mm, 35mm and 200mm).

This result is hardly surprising given the popularity of Asahi Pentax cameras among amateur photographers and world-class lens-making skills shown by employees of the Asahi Optical Company in the period.

What about the future? By 2020 when sample size exceeds 50K (?) an emphasis on serial numbers will give way to other interests.

Presently, Takumar Field Guide sample size is 48,200 copies. It is estimated 7,677,300 copies in 4,937 identified batches were produced.

The last batch (Super-Multi-Coated TAKUMAR 28mm) was completed in 1980 with its last observed lens SN 8419613.

Expansion of the P67 Field Guide continues. From 1969 to 1975 approximately 350K (TAKUMAR and PENTAX) 6x7 lenses were made.

Regards

Droo

]]>This result is hardly surprising given the popularity of Asahi Pentax cameras among amateur photographers and world-class lens-making skills shown by employees of the Asahi Optical Company in the period.

What about the future? By 2020 when sample size exceeds 50K (?) an emphasis on serial numbers will give way to other interests.

Presently, Takumar Field Guide sample size is 48,200 copies. It is estimated 7,677,300 copies in 4,937 identified batches were produced.

The last batch (Super-Multi-Coated TAKUMAR 28mm) was completed in 1980 with its last observed lens SN 8419613.

Expansion of the P67 Field Guide continues. From 1969 to 1975 approximately 350K (TAKUMAR and PENTAX) 6x7 lenses were made.

Regards

Droo

Smaller lenses (

Comprehensive updating in M42 and 6x7 databases will occur in February 2019.

Regards

Droo]]>

Takumarology lists M42 lenses in order of their observed serial numbers. (It's under Collection)The historical accuracy of this data will be updated, regularly. An article following this list gives insights into 1.4 / 50mm lens developments. It’s not photography; but interpreting history, and as challenging? Regards Droo |

In 2018

Your use of this resource grows daily. Issues you raise increase the value for all.

Thank you.

Cheers,

Droo]]>

A late Model II 1:4/300mm Takumar was the coolest lens I'd seen. Purchased, 8 years old, at a pawn shop in 1974 when attending an Antarctic conference in Washington DC. A seed that grew into a collection and still well loved.

First made for the Asahi Pentax K (1958) from a mysterious Asahiflex prototype and developed through several increasingly popular models.

Sample size i.e. ∑n (%) has passed 33,200 (0.43%) of 7,800,000 lenses in 4,435 batches.

Cheers

Droo

]]>First made for the Asahi Pentax K (1958) from a mysterious Asahiflex prototype and developed through several increasingly popular models.

Sample size i.e. ∑n (%) has passed 33,200 (0.43%) of 7,800,000 lenses in 4,435 batches.

Cheers

Droo

Data collection continues for a 2018 edition of Frequency table in

A draft chronology using serial numbers is evolving in

Cheers,

Droo

]]>

Numerical data on lens pages and summaries are up to date to February. Lens pages now show observed status.

Numbers of lenses observed is expressed as a percentage of their estimated production.

Overall sample size i.e. ∑n (%) is passing 30,500 (0.39%) currently.

In 2017 a serial number overview and tables of 2017 model frequencies are in preparation.

Regards,

Droo]]>

Two milestones have been reached on this journey.

Takumar Field Guide categories all have

These are the most accurate quantitative information about Takumar M42 lenses available.

The numerical data will be reviewed annually to increase definition and accuracy.

A third level of description and graphics seen in the early pages of the Guide promises more qualitative interest.

Takumar demography is changing and can now be focussed a little more clearly.

Droo]]>

Serial numbers added in all lens categories this year significantly improved batch definition.

Now around 26,000 observed serial numbers in 4,000 batches give a mean of 7,900,000 lenses.

I feel the results are beginning to shape what must have been reality.

Standard preset Takumars (for the AP, S and K in 1957-1958) are in the Field Guide; now with graphics.

They demonstrate pre- and post production tweaking in the lab; rapid innovation in AOCo.

I hope there are some surprises and more questions than answers.

Regards,

Droo]]>