ZM 28/2.8 Biogon v CV 28/2.5 Ultron

[PhatGuido]

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Anyone have experience between the both..

 

Is the ZM worth another 30%?

 

Thanks in advance

[kully]

I presume you mean the Ultron 28/2.

 

I bought the Ultron first, but it exhibited noticeable focus shift. I then bought the ZM28/2.8 and it's been lovely.

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[jsrockit]

I wonder why, if cosina makes both of these lenses, the Voigtlanders have shift and the Zeiss stuff doesn't.

[!Nomad64]

I wonder why, if cosina makes both of these lenses, the Voigtlanders have shift and the Zeiss stuff doesn't.

 

Erwin Puts explained:

 

"Traditionally Cosina has been good at delivering high value products, that is good quality and very low prices, balancing cost with performance. It would be unfair to fault the basic designs of the Cosina lenses which are very good, but is it fair to note that the production quality is uneven because of wider tolerance margins and older manufacturing equipment. Zeiss lenses are designed in Oberkochen, taking advantage of lens expertise from the cinematographic and micro-lithographic departments and of course the photographic heritage, but the production has been outsourced to Cosina. The injection of additional expertise in quality control in the Voigtlander manufacturing process has upgraded the overall mechanical quality of the lenses. Most recent Zeiss lenses now have a label saying that they are under Zeiss quality control and guarantee."

 

Hope this helps,

Bruno

[PhatGuido]

I presume you mean the Ultron 28/2.

 

I bought the Ultron first, but it exhibited noticeable focus shift. I then bought the ZM28/2.8 and it's been lovely.

- Correct, my bad.. Dang why are there so many different versions LOL.

[batmobile]

completely different designs. The 28 ZM is very sharp and its only vice is that while not flare prone, when it does flare it does quite badly. It is still more flare resistant than most lenses tho.

[Baxter]

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I have two Zeiss lenses, the 28 and 50 f2, they are fantastic. I also have the 90mm CV lens which now stays in its box, the quality is appreciably lower than the Zeiss optics.