Video expert Dan Chung previews the A7rII# PhotoGear - 摄影器材
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http://www.sonyalpharumors.com/dan-chung-previews-the-a7rii-and
"Video expert Dan Chung from Newsshooter had the chance to test the
preproduction Sony A7rII and writes:
1) The S35 4K image really is free of any obvious errors – fine detail was
incredibly well resolved and there was virtually no evidence of aliasing and
moire at base ISO. When I looked at the image on a monitor it was very
clean. It had excellent detail and in S-Log2 there was certainly a lot of
information in the shadows and highlights. There was some noise in the
shadows but nothing excessive.
2) The second big surprise is that the full-frame 4K mode also looks
remarkably good. I assume that pixel-binning is being used to reduce the
output of the 42-megapixel sensor to achieve this. The 4K full-frame output
of the a7R II is really excellent. There are some traces of aliasing visible
on lines of high contrast, but you really have to look for them.
3) Low light performance was the third big surprise. I wasn’t expecting
great things from a camera with such a high pixel count – I was wrong. The
camera acquits itself very well even at 6400 ISO. Noise is present but the
image was still usable.
4) The fourth big surprise came when I panned the camera from side to side
looking for evidence of rolling shutter.
5) A small bad news: Autofocus with adapter EOS lenses does not work as well
in video as it does in stills mode. The only way to get the PDAF working
continuously in video is to use Sony’s own E-mount lenses. It doens’t work
with A-mount or Canon EF lenses.
"
"Video expert Dan Chung from Newsshooter had the chance to test the
preproduction Sony A7rII and writes:
1) The S35 4K image really is free of any obvious errors – fine detail was
incredibly well resolved and there was virtually no evidence of aliasing and
moire at base ISO. When I looked at the image on a monitor it was very
clean. It had excellent detail and in S-Log2 there was certainly a lot of
information in the shadows and highlights. There was some noise in the
shadows but nothing excessive.
2) The second big surprise is that the full-frame 4K mode also looks
remarkably good. I assume that pixel-binning is being used to reduce the
output of the 42-megapixel sensor to achieve this. The 4K full-frame output
of the a7R II is really excellent. There are some traces of aliasing visible
on lines of high contrast, but you really have to look for them.
3) Low light performance was the third big surprise. I wasn’t expecting
great things from a camera with such a high pixel count – I was wrong. The
camera acquits itself very well even at 6400 ISO. Noise is present but the
image was still usable.
4) The fourth big surprise came when I panned the camera from side to side
looking for evidence of rolling shutter.
5) A small bad news: Autofocus with adapter EOS lenses does not work as well
in video as it does in stills mode. The only way to get the PDAF working
continuously in video is to use Sony’s own E-mount lenses. It doens’t work
with A-mount or Canon EF lenses.
"
