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

Started 4 months ago | User reviews thread
xmeda
xmeda Senior Member • Posts: 1,899
Re: Pentax SMC DA* 60-250mm f4 ED (IF) SDM is a STAR!
2

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. 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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