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next PZ lens test report: Carl Zeiss E 16-70mm f/4 OSS
#24
Regarding Sony / Sony-Zeiss / Zeiss-

 

Zeiss is partnered with Sony.  They exchange resources.  A zeiss-badged sony lens has had some level of Zeiss involvement in the design but most likely was not designed entirely by a Zeiss lens designer or lens design team.  Zeiss may be concerned about rep, but also maybe not - consumers are incredibly "easy" on camera optics in that typically most anything looks/performs just fine to them.  Zeiss has a greater goal of brand recognition than namesaving right now. 


Regarding astigmatism and the like - A typical but arbitrary number is that light from over 200 focal lengths away is effectively at infinity to a very good approximation.  The test chart is probably closer than 14m for the 70mm test, so it is within the failure range of this approximation.  As a lens is refocused, performance often changes significantly.  I do believe astigmatism and CAs are the chief problems in the images here, as the images do not reflect a high level of spherical aberration, oblique spherical, or coma.  This leaves only astigmatism and polychromatics to be the big problem. 


 

  


Messages In This Thread
next PZ lens test report: Carl Zeiss E 16-70mm f/4 OSS - by Scythels - 03-29-2015, 07:54 PM
next PZ lens test report: Carl Zeiss E 16-70mm f/4 OSS - by davidmanze - 03-30-2015, 12:50 AM
next PZ lens test report: Carl Zeiss E 16-70mm f/4 OSS - by Scythels - 03-30-2015, 03:08 AM
next PZ lens test report: Carl Zeiss E 16-70mm f/4 OSS - by Scythels - 03-30-2015, 04:19 PM
next PZ lens test report: Carl Zeiss E 16-70mm f/4 OSS - by davidmanze - 03-30-2015, 04:36 PM
next PZ lens test report: Carl Zeiss E 16-70mm f/4 OSS - by Scythels - 03-30-2015, 05:28 PM
next PZ lens test report: Carl Zeiss E 16-70mm f/4 OSS - by davidmanze - 03-30-2015, 06:43 PM
next PZ lens test report: Carl Zeiss E 16-70mm f/4 OSS - by Scythels - 03-30-2015, 07:41 PM
next PZ lens test report: Carl Zeiss E 16-70mm f/4 OSS - by Scythels - 03-30-2015, 08:56 PM
next PZ lens test report: Carl Zeiss E 16-70mm f/4 OSS - by davidmanze - 03-30-2015, 09:05 PM
next PZ lens test report: Carl Zeiss E 16-70mm f/4 OSS - by Scythels - 03-30-2015, 10:46 PM
next PZ lens test report: Carl Zeiss E 16-70mm f/4 OSS - by davidmanze - 04-01-2015, 05:00 PM
next PZ lens test report: Carl Zeiss E 16-70mm f/4 OSS - by Scythels - 04-02-2015, 03:16 AM
next PZ lens test report: Carl Zeiss E 16-70mm f/4 OSS - by ficofico - 04-03-2015, 05:44 PM
next PZ lens test report: Carl Zeiss E 16-70mm f/4 OSS - by Writer63 - 04-06-2015, 05:57 PM

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