I have just recently posted a note about my experience with a bad Pentax DA 10-17mm lens – it is now on its way for exchange to the dealer I bought it from.
This experience was for me quite an eye opener as after over 30 years of using SLR and lately DSLR cameras (last 20 years exclusively Pentax), I never had a problem with any lens. And I have purchased/sold over all these years many second hand lenses, mind you mostly manual focus primes, and it never occurred to me that as long as the glass is perfectly clear, something could go wrong with the lens. Now I see that at 63 I should have been less naïve and maybe more educated…
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So, I started reading this SLR lens forum with the focus on bad lenses, and it looks like some kind of “misalignment and a little defect here and there” is fairly frequent, especially with the new high-tech lenses. As I am just considering to buy almost a new Pentax lens from a member of this forum, it makes me think seriously about warranty, even so that the lens in question is evidently in a good shape.
One must wonder as well, how representative/objective are all these lens evaluations and comparisons, considering that a tested lens might have a “little defect” making it perform and have an IQ worse than the same lens in an optimum/perfect condition. How can you tell that a lens you are testing is truly a perfect copy?!
Is there any consensus on this issue?
Last edited by luma; 05-20-2010 at 04:21 PM.
Reason: misspelled