They tested lenses against their design specifications. Not the designs
themselves...
mike wilson wrote:
> J. C. O'Connell wrote:
>
>
>> Nobody came up with the answer to my quiz why
>> the Pentax Takumar Screw mount lenses were/are all
>> so good?
>>
>> Answer : They were 200% optical bench tested
>> before being sold in USA. Thats right, 200%.
>>
>> Every single final assembled Takumar Lens
>> was optically bench tested at the Asahi
>> factory in Japan before being imported into
>> the USA by Honeywell. THEN, once Honeywell
>> got them, Every single lens was optically bench tested AGAIN
>> by Honeywell before being put for sale in
>> USA. This is why ( along with the superb build
>> quality ) there is such consistant high optical quality for these
>> lenses as the dogs were all rejected in the process.
>>
>
> How did the 20mm(?) (alleged) Bow-wow get through that?
>
>
>> I doubt that many lenses today are subjected to
>> such high quality control. I am sure expensive
>> ones still are, but not the entire lens series.
>> It would be way too costly in today's market I would
>> especially when the build quality of many lenses
>> ( especially budget models ) would create more rejects.
>>
>> This brings up another thought, wouldnt it have been
>> cool to work in that test dept and have a company
>> discount to purchase the lenses? I mean, if a given
>> lens had to meet say, 75 lp/mm to pass test, and they
>> typically ran say, 80 to 85 lp/mm, what would be cool
>> would be to sit aside and buy the occasional 90 to 95 lp/mm
>> lens that might have squeaked thru once in a while.
>> Employees get to buy the "gems" so to speak! I wonder if this actually
>> occured, or maybe Pentax or Honeywell permitted it? That
>> would interesting to find out.
>>
>> jco
>>
>>
>>
>>
>>
>>
>>
>>
>
>
>
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