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  Previous versions of ecarlino's message #13647658 « LensRentals: Planar T* FE 50/1.4 ZA is absolutely superb! »

  

ecarlino
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Re: LensRentals: Planar T* FE 50/1.4 ZA is phenomenally good ...


Fred, i think for your and Guy\'s first project as Roger\'s interns, you guys can shave down the glass that Roger uses - he mentions that it\'s just a touch thinner than the actual sensor glass used by Sony.

Roger comments in his article:

One note about that Ďhalfway sagí for both of you who actually read the articles and donít just look at the graphs. This may be an artifact of sensor cover glass. We are limited to a full mm cover glass increments when testing, so for Sony lenses we use 2mm, which is close, but not exactly the same optical thickness as what covers the sensor. (Itís probably about 0.25 thicker). We generally donít think of a 0.25mm difference as significant for SLRs, but that may not be absolutely true with the short back-focus distance of the FE mount. In other words, the Sony lens may actually be a bit better than what we see here. Or they may not, we arenít certain yet.



Jul 18, 2016 at 02:08 PM
ecarlino
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Re: LensRentals: Planar T* FE 50/1.4 ZA is phenomenally good ...


Fred, i think for your and Guy\'s first project as Roger\'s interns, you guys can shave down the glass that Roger uses - he mentions that it\'s just a touch thicker than the actual sensor glass used by Sony.

Roger comments in his article:

One note about that Ďhalfway sagí for both of you who actually read the articles and donít just look at the graphs. This may be an artifact of sensor cover glass. We are limited to a full mm cover glass increments when testing, so for Sony lenses we use 2mm, which is close, but not exactly the same optical thickness as what covers the sensor. (Itís probably about 0.25 thicker). We generally donít think of a 0.25mm difference as significant for SLRs, but that may not be absolutely true with the short back-focus distance of the FE mount. In other words, the Sony lens may actually be a bit better than what we see here. Or they may not, we arenít certain yet.



Jul 18, 2016 at 02:05 PM
ecarlino
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Re: LensRentals: Planar T* FE 50/1.4 ZA is phenomenally good ...


Fred, i think for your and Guy\'s first project as Roger\'s interns, you guys can shave down the glass that Roger uses - he mentions that it\'s just a touch thicker than the actual sensor glass used by Sony.


Jul 18, 2016 at 02:02 PM





  Previous versions of ecarlino's message #13647658 « LensRentals: Planar T* FE 50/1.4 ZA is absolutely superb! »