Phillip Reeve Offline Upload & Sell: Off
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Bijltje wrote:
Does anyone know how "real" zeiss the lens is? Is it a rebranded sony lens, made by sony, designed by zeiss, like the many zeiss/ sony, or panasonic/ leica lenses out there. Or is it really a zeiss (or cosina) made lens and than shipped to sony to fit into the camera?
The calculated MFT chard kinda shows zeiss has nothing to do with it as they would show a measured chard.
douglasf13 wrote:
Sony ZA lenses, and I assume this RX1 lens, are designed by Zeiss in cooperation with Sony, and they're built by Sony under Zeiss QC. All of the Zeiss ZA lenses show this type of mtf chart.
link
I am pretty sure that this info is not correct. All Sony-Zeiss Lenses are developed by Sony and have to fulfill certain criteria as defined by Zeiss.
My sources: A thread in a german forum in german as translated by google translate.
Some quotes: (the autor, Stephan Kölliker had some direct contacts to Sony before he withdraw from the Sony system after it was obvious that they would no longer develop OVF-cameras):
"Die Zeiss ZA-Optiken werden von Sony gerechnet, allerdings nach Kriterien von Zeiss. Interessant ist, dass die Konstrukteure - die eigentlich wissen müssen, was sie rechnen - den eigenen "G"-Standard als besser als die Zeiss-Vorgaben betrachten. Sony-Zeiss-Optiken werden nicht in einem einzigen Werk gebaut, sondern teils in Sony-eigenen Werken und teils ausgelagert (ich spreche da von den Vollformat-Optiken; dass etwas dubiose ZA 16-80mm sei mal aussen vor gelasssen). Zudem ist aus den Objektiv-Querschnitten z. B. des MinAF 3.5/17-35mm G (Minolta), des MinAF 2.8-4/17-35mm D (Tamron) und des Sony-Zeiss ZA 2.8/16-35mm eine enge Verwandtschaft der Konstruktionen ersichtlich - was die Aussagen von D. Klipatrick natürlich stützt."
my attempt of fixing the google translation:
"The Zeiss ZA-optics are calculated by Sony, but after criteria from Zeiss. Interestingly, the designers - who actually need to know what they do - regard their own "G" standard as better than the Zeiss specifications. Sony Zeiss optics are not built in a single work, but partly in Sony's plants and partly outsourced (I speak here of the full-frame optics, disregarding that somewhat dubious ZA 16-80mm ). In addition, from the cross-sections of eg. the MinAF 3.5/17-35mm G (Minolta), the MinAF 2.8-4/17-35mm D (Tamron) and the Sony Zeiss ZA 2.8/16-35mm you can see a close relationship between the constructions - naturally this supports D. Klipatricks statement.
Another quote from Matthias Paul, Admin of mi-fo.de and not someone who bases his claims on speculation:
"Zeiss hat mir, auf dieses Thema angesprochen, auf der photokina explizit gesagt, daß die ZA-Objektive von Sony entwickelt und durch Sony in Japan produziert werden. Zeiss' Anteil in dieser Kooperation ist es, die Einhaltung bestimmter von Zeiss vorgegebener Kriterien zu überprüfen, bevor ein Sony-Objektiv das Zeiss-Label tragen darf. "
"When i asked them at photokina, Zeiss explicedly told me that the ZA lenses are developed by Sony and produced by Sony in Japan. Zeiss' share in this co-operation is to verify compliance with certain criteria specified by Zeiss, before a Sony lens may carry the Zeiss label. "
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