09-25-2013, 10:09 AM
It's not on me to tell others how to use their resources. I just think, if half a dozen labs already came to more or less the same conclusion, I'd use my energy for other projects. Anyway, enjoy testing.
About comparability: your testing equipment is, hmm not very contemporary. So, if I look for a lens test, I first try to find one closer to the equipment that I have to get some ideas what to expect. It's not a bad thing being the site to look for when it comes to aged lenses, nobody else does test them. But the question remains, how good those lenses still are and were maintained whilst their lifetime. Especially elder lenses can provide surprises and what does it say, if the sample you're testing is coincidentally on the excellent or on the rubbish side of tolerance?
I recall a lens test (guess it was a Sigma wide angle) where you got 3 copies to find one without centering failures. In my eyes for that alone I could not understand why you rated the lens anyway. After swing the variation of lenses at lensrentals, I'm no longer so much a believer of lens tests in general. Especially not lens tests with one sample only...
About comparability: your testing equipment is, hmm not very contemporary. So, if I look for a lens test, I first try to find one closer to the equipment that I have to get some ideas what to expect. It's not a bad thing being the site to look for when it comes to aged lenses, nobody else does test them. But the question remains, how good those lenses still are and were maintained whilst their lifetime. Especially elder lenses can provide surprises and what does it say, if the sample you're testing is coincidentally on the excellent or on the rubbish side of tolerance?
I recall a lens test (guess it was a Sigma wide angle) where you got 3 copies to find one without centering failures. In my eyes for that alone I could not understand why you rated the lens anyway. After swing the variation of lenses at lensrentals, I'm no longer so much a believer of lens tests in general. Especially not lens tests with one sample only...