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Pentax SMC DA* 60-250mm f4 ED (IF) SDM is a STAR!

Started 4 months ago | User reviews thread
3Percent
OP 3Percent Senior Member • Posts: 1,045
Re: Pentax SMC DA* 60-250mm f4 ED (IF) SDM is a STAR!
3

xmeda wrote:

3Percent wrote:

Brentliris wrote:

I have this lens, bought used got sheet with the extensive repairs done on the lens, the original owner must have had a mishap with it. It's a beautiful lens and one that I might even pick up another as backup..

Not a bad investment. The percentage of SDM failures with this lens is very low compared to some others. The K-3III really breathes new life into the whole lineup, not just this lens. But I'm a big fan of this one for sure.

Improper use of statistic.

Not according to Adam at pentaxforums.com, it was about the percentages of ownership, not the total amount of failures.

There were much less 60-250/4 lenses sold when compared to 17-70/4, 16-50/2.8 and 50-125/2.8. So it seems that there were less SDM failures. Same applies for DA*200/2.8 and DA*300/4.

An example

you sell 200x 17-70/4 lens and you have 20 fails

you sell 10x 60-250/4 lens and you have 1 fail

Which has lower failure percentage?

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