Originally posted by ManuH I don't understand that one. If more light is transmitted to the sensor, some will be lost for the AF if I'm not mistaken. Not necessarily wanted to gain 1/3 stop and lose AF performance.
Even if AF would work well with less light, we don't know if a semitransparent mirror reflecting only this little light and not creating too much ghost images exists.
Originally posted by Sperdynamite And honestly it's less than 1/3rd stop not a big deal.
Originally posted by Winder We know Sony is losing 1/3 stop of light to the mirror.
It is 1/2 stop.
50% light loss would be a full stop. 30% light loss which is what the SLT mirror does, is 1/2 stop.
And it may be right that 1/2 stop isn't a big deal. But then, please stop to care about the difference of a DxO low iso score of 800 vs. 1200 ...
Originally posted by Zygonyx I doubt it can be better "dynamic range" wise : -0,9 EV as measured by DxO.
Ok, I'll try one more time ...
Currently, there is only
ONE comparison in the DxO database which is meaningful:
Sony A-77 vs. Sony A-35.
It is meaningful because both cameras are similiar enough (e.g., both are 12 Bit, are Sony and have the SLT mirror). And it is meaningful because the A-35 has the K-5 sensor. Ignore all other comparisons. And no, we don't have to wait for the NEX-7 test.
And then you'll find:
A-77 sensor vs. sensor used in the K-5:
-
Identical SNR18% noise performance (aka low iso noise)
-
DR improved by 0.1 EV (I'll ignore the even better ISO 50 value because the K-5 already applies the extended ISO 80 setting and 80->50 is what the SLT mirror provides.).
- Tonal and Color sensitivity are
identical.
According to current best available wisdom, the Sony 24MP and 16MP sensors perform exactly the same. Only the 24MP sensor has more pixels of course.
100% crop image to image comparisons don't say otherwise as they all compare apples to oranges. As I tried to illustrate in an earlier posting.
So, please everybody, stop jumping to conclusions here. Shoot, resize for the web (or the printer does it for you) and you'll see...