Originally posted by stevebrot How many non-failed lenses at dpReview?
If the SDM failure rate was 10%, 50 failed lenses would mean there are 500 SDM lenses at DPR.
If the SDM failure rate was 1%, 50 failed lenses would mean there are 5000 SDM lenses at DPR.
If the SDM failue rate was .1%, 50 failed lenses would mean there are 50,000 SDM lens at DPR.
I don't think there more than 5000 SDM lenses at DPR. I would bet there are more than 500 SDM lenses at DPR, so I think the failure will have to be between 1-10%. The best case of a 1 in 100 chance for a $1000 lens doesn't really excite me. I personally would hope for at least 1 in 1000, but I don't actually think 50,000 SDM lenses have even been produced.
I don't know if the serial numbers are sequential, but my 50-135mm has a serial number in the 6000s. Anyone have a higher serial number on a 50-135mm?
Maybe it would be good to have people post the range of the serial number they have per each SDM lens? Maybe this maybe would give some idea of how many are produced in each lens type, 16-50, 50-135, 17-70, 60-250, 55, 200, and 300.
Thank you
Russell