Forum: Pentax K-1 & K-1 II
05-27-2016, 05:25 PM
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I have a ZE and ZF 50/1.4 Planar that are well decentered since day 1 too :)
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Forum: Pentax K-1 & K-1 II
05-27-2016, 02:17 AM
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Just because Zeiss lenses have infinity hard stop doesn't mean the focus plane is at infinity (can be only partially).
I've found one ZF 21/2.8 Distagon, one ZF 35/2 Distagon and three ZE 25/2 with decentering issues revealed at infinity. I bought them all for astrophotography in the first place (why the infinity stop should make it easier to focus in darkness) - BUT it turned out the stars were pinpoint only in the half of the frame and the other half is filled with star-bokeh. The newer Zeiss like FE 55/1.8 is also prone to decentering. Ask the Sony guys :hmm:
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Forum: Pentax K-1 & K-1 II
05-26-2016, 05:41 PM
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I think if the item has used marks it will go back to Canon, if it still looks new, well... who knows?
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Forum: Pentax K-1 & K-1 II
05-26-2016, 04:42 PM
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My situation with the 24-70L II was made even more difficult because this lens (good copy) exhibits a curvature at infinity past 24mm. So landscape photos with subjects far away will only be sharp in the center (30-40% of total frame) and gets mushy to the edges. This is very evident around 35mm-50mm settings and no f/8 or f/11 would help. When I brought this over to some photogs in another forum they confirmed this (and mostly just realized). I'm selling this last lens of mine and will never look back ;)
Bottom line is, every lens got its own character, and testing when buying is mandatory. I'm happy to report that my D-FA 28-105 is well centered and gives me sharp infinity focus I could never get with the L lens.
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Forum: Pentax K-1 & K-1 II
05-26-2016, 03:56 PM
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My experience with 24-70L II is that infinity and close focus could have different behavior - and I'm on the 5th sample currently. My Zeiss ZE 25/2 is the third unit (first unit was 30% of the frame being soft on the left side, this 3rd unit is 10% soft (left side too) which is "normal and expected" according to a Zeiss tech support in Germany. I remember that very same guy mocked Japanese lenses QC when giving presentations at Zeiss events). Those lenses didn't pass the infinity test which showed the flaws. The better brands for this kind of issue are Leica M and Sigma Art. With Sigma you could still get a decentered unit but the chance is much lower than Canon and Zeiss ZE/ZF in my experience.
So yeah, it kinda pisses me off the manufacturers sell high-end lenses but think they don't have any obligation to deliver good quality units.
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