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10-22-2010, 04:19 PM   #1
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Lens Defect Survey Results

Interesting data collection/analysis:

LensPlay - Lens defects

10-22-2010, 04:26 PM   #2
JHD
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Considering the market share for PENTAX, that number is way too high.
10-22-2010, 04:27 PM   #3
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Proportionally, it looks like Nikon has the best record.
10-22-2010, 04:31 PM   #4
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QuoteOriginally posted by JHD Quote
Proportionally, it looks like Nikon has the best record.
But I thought Pentax came out the best (not that this is scientific, as the web page says).

10-22-2010, 04:31 PM   #5
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pretty pointless survey, i was hoping they would describe faults by type.
10-22-2010, 04:49 PM   #6
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QuoteOriginally posted by JHD Quote
Considering the market share for PENTAX, that number is way too high.
What are you talking about? They are still higher than any other manufacturer listed including the 3 3rd party lens makers. The odds of getting 5 in a row are really telling.

LensPlay - Lens defects
10-22-2010, 04:52 PM   #7
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QuoteOriginally posted by JHD Quote
Proportionally, it looks like Nikon has the best record.
Actually, not.

QuoteQuote:
Sigma lenses - 2933 with 661 defects
The probability of getting a good lens is 77 %
The probability of getting 5 good Sigma lenses in a row is 28 %
Tamron lenses - 1454 with 216 defects
The probability of getting a good lens is 85 %
The probability of getting 5 good Tamron lenses in a row is 45 %
Tokina lenses - 490 with 80 defects
The probability of getting a good lens is 84 %
The probability of getting 5 good Tokina lenses in a row is 41 %
Nikon lenses - 2371 with 194 defects
The probability of getting a good lens is 92 %
The probability of getting 5 good Nikon lenses in a row is 65 %
Pentax lenses - 1508 with 97 defects
The probability of getting a good lens is 94 %
The probability of getting 5 good Pentax lenses in a row is 72 %
Minolta/Konica/Sony lenses - 650 with 61 defects
The probability of getting a good lens is 91 %
The probability of getting 5 good Minolta/Sony lenses in a row is 61 %
Other lenses - 943 with 96 defects
The probability of getting a good lens is 90 %
The probability of getting 5 good Other lenses in a row is 58 %
QuoteOriginally posted by robjmitchell Quote
pretty pointless survey, i was hoping they would describe faults by type.
True. Was it decentering, sdm etc. which series and so forth . . .
10-22-2010, 06:14 PM   #8
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Looks to me like it speaks well to the quality (continuing I might add) of Pentax glass. This would have also encompassed the SDM issues with the 50-135 from a year or so ago too. While it certainly doesn't scientifically prove anything (sample size is too small), it does reinforce what I have believed for some time.

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