p.3 #1 · Are Sony-made AF Zeiss lenses in fact Zeiss lenses?
It's said that Pentax pulled a huge marketing coup through their advertising of Super Multi Coated. In fact Zeiss, Leica and many others were already applying multiple layers of coating at that time. Because of Pentax marketing, it forced some of the others, such as Zeiss, to also market - and name - their use of multi-coating. Thus we got the T* branding from Zeiss - but it is a fact that many Zeiss lenses produced before they were labeled T* were multi-coated.
p.3 #2 · Are Sony-made AF Zeiss lenses in fact Zeiss lenses?
sebboh wrote:
nano coating is just a marketing term (anything with the word nano in it is really), and probably trademarked just like the T*.
That's not true. Nano coatings are nano structures that basically make the refractive index transition between air and glass very gradual and suppress reflections that way -- a mechanism completely different from simple thin layers of metal oxide/fluoride. One of the advantages of nano coatings is that their effectiveness is basically angle independent (good for strongly curved elements), which is not true at all for traditional AR coatings of course.
Samyang is apparently using nano coatings too now.
p.3 #4 · Are Sony-made AF Zeiss lenses in fact Zeiss lenses?
AhamB wrote:
That's not true. Nano coatings are nano structures that basically make the refractive index transition between air and glass very gradual and suppress reflections that way -- a mechanism completely different from simple thin layers of metal oxide/fluoride. One of the advantages of nano coatings is that their effectiveness is basically angle independent (good for strongly curved elements), which is not true at all for traditional AR coatings of course.
Samyang is apparently using nano coatings too now.
everything is a nano structure and i'd be very surprised if everybody isn't using the tech you describe.
p.3 #5 · Are Sony-made AF Zeiss lenses in fact Zeiss lenses?
Tariq Gibran wrote:
It's said that Pentax pulled a huge marketing coup through their advertising of Super Multi Coated. In fact Zeiss, Leica and many others were already applying multiple layers of coating at that time. Because of Pentax marketing, it forced some of the others, such as Zeiss, to also market - and name - their use of multi-coating. Thus we got the T* branding from Zeiss - but it is a fact that many Zeiss lenses produced before they were labeled T* were multi-coated.
Super Multi Coating specifically refers to a patented coating technology for using a larger number of layers than previously used. SMC coatings were initially 7 or more layers, where previously multicoated designs typically used 2-4 layers.
NIC, Nikon's equivalent to SMC, made the same differentiation from earlier Nikon coated designs, which are often erroneously referred to as single-coated, like the Series E lenses or all non-NIC pre-AI lenses.
p.3 #7 · Are Sony-made AF Zeiss lenses in fact Zeiss lenses?
mawz wrote:
Super Multi Coating specifically refers to a patented coating technology for using a larger number of layers than previously used. SMC coatings were initially 7 or more layers, where previously multicoated designs typically used 2-4 layers.
NIC, Nikon's equivalent to SMC, made the same differentiation from earlier Nikon coated designs, which are often erroneously referred to as single-coated, like the Series E lenses or all non-NIC pre-AI lenses.
Looks like Zeiss was using around 6 layers for their multi-coating - later named T*. We know there are Zeiss lenses made for Hasselblad even in the early 70's that used this more advanced process (more layers).
p.3 #8 · Are Sony-made AF Zeiss lenses in fact Zeiss lenses?
Hassy lenses are a great way to see the advances in Zeiss' T* coating, too. Take a C, CF, and CFE Planar 80, shoot the same backlit scenario with them, and watch the center contrast improve dramatically older to newer.
