Jump to content

Sony A7R III T* on EVF


Sean Eld
 Share

Recommended Posts

I'm considering purchasing a Sony A7RIII or A7III. Something that I noticed is this orange T* icon near the side of the EVF component. Could anyone explain what this means? I tried to search for it elsewhere, but had no luck. I did notice that there are some lenses with this designation on them (e.g. Sony 24-70mm f/4 ZA Vario-Tessar T* OSS). Is this icon stating it is compatible with those lenses?

Thanks!

 

Welcome, dear visitor! As registered member you'd see an image here…

Simply register for free here – We are always happy to welcome new members!

Edited by Sean Eld
Adding additional information
Link to post
Share on other sites

Zeiss has been using the T* designation on most of their lenses for decades.  It is most frequently remembered due to their collaboration with Yashica when they both used the same lens mount -- commonly called the "C/Y-mount" -- referring to the Contax and Yashica SLR cameras that they collaborated in making.  Yashica and Zeiss created their own lines of lenses, but most could be used interchangeably on each others' cameras.  Many of their accessories where interchangeable as well.  And nearly all of their lenses were multi-coated -- they just used different labels -- with Zeiss calling their coating T*.  All the other lens companies multi-coated their lenses as well, and many of them came up with names that were "fancier" than "multi-coated", such as Yashica with "ML", Tamron with "BBAR", Fuji with "EBC", Minolta with "Apochromatic coating", etc.  And just as lens optical designs were different, lens coatings were different.  That doesn't automatically make one "better" than another.  Still, lots of shutterbugs (AKA, snobs) claim that one design, or coating, or brand is far superior to another.

Look up "cognitive dissonance" in any psychology text book.

Edited by XKAES
Link to post
Share on other sites

The viewfinders of cameras with the T* probably do have some Zeiss coating, but that can mean just about anything.  As with any "multi-coated" lens, the definition is not actually defined.  Minolta, Fuji, and some other lens makers have stated that their multi-coating varies from lens element to lens element -- and that it is only applied where it is beneficial.  In reality, some multi-coated lenses, may only have multi-coating on some elements -- with the other elements being single-coated.  For example, the Zeiss 500mm f8 T* Mirotar CAT -- one of the best 500mm CATS (along with the Yashica 500mm ML) -- appears to have only one multi-coated element.

So the "viewfinder" of some Sony cameras having a T* may simply mean that one side of one "element" in the viewing system has a Zeiss coating -- just like coated eye glasses!  Does it make a difference that you will notice?  Well, it can't hurt, I suppose.

Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share

  • Posts

    • I mostly see posterization artifacts, which are the result of lossy compressed RAW files (or bad jpeg conversion). Unfortunately, the A6400 doesn't offer uncompressed or lossless compressed RAW. The noise might indeed result from the smaller sensor than what you're used to. If you're not shooting at max aperture, you could try shooting at wider aperture and lower ISO. When you're not shooting at max aperture, fullframe versus APS-C shouldn't matter much in terms of ISO-performance combined with depth of field: at the same ISO and aperture value, fullframe offers better noise performance but with a narrower depth of field. This can be offset by choosing a larger aperture and lower ISO on the APS-C camera. If you want a fullframe camera the size of an A6400, try the A7C(ii).
    • ..unfortunately, the lighting was correct. The shot required deeper shadows. The K1 ff didnt have these banding issues [yes, I know the sensor is larger]. The film shots had details in the same light. The sony files, both the jpg and raw, had this banding/noise - with NO retouch or post adjustments [straight out of the camera]. the camera was purchased new a few years ago and I am trying to determine if there is something wrong, or the settings are wrong, or the camera just cant handle this kind of lighting [studio + softbox]. No shadow detail is one thing... banding/noise in the shadows is unacceptable. Does sony have a body this size that is FF ? Im wondering if that would make a difference..  dw
    • The root causes for banding are uneven lighting, incorrect exposure settings, or compression artefacts or certain kinds of artificial lighting, especially LED lights. Also the lens used plays a role, I have noticed it more with my sharpest lenses, looks like they outresolve the sensor when I have a uniform blue sky. There is more than one solution, and ultimately post-processing, but the root cause has to be identified first.
  • Topics

×
×
  • Create New...