Ming的A7R的review出来了# PhotoGear - 摄影器材
m*l
1 楼
值得一看，他自己是用D800E和E-M1的，各种对比也很实在。 如果要对比A7R的AF的话
，和E-M1比较，那么按1-10 scale来说：
对焦速度：Oly 10， A7R 6
对焦精度：Oly 9， A7R 6
追焦： Oly 7， A7R 5
acquisition time: Oly 10, A7R 7
blog.mingthein.com/2014/01/08/sony-a7r-review/
其他的summary：
Vs Nikon D800E: Here, it all boils down to the system of lenses and flashes:
if you need any special purpose gear at all, or longer lenses, then the
balance tips heavily in favor of the D800E. I think the shooting envelope is
a bit wider, too – given the much better shutter mechanism. Of course, if
you’re travelling on a strict weight budget, then I’d go with an A7R, 55mm
and Ricoh GR.
Vs Leica M 240: From what I understand from people who do use the A7R and M
glass, not all lenses are great; you need to try individual ones to see what
plays nice and what doesn’t. And be prepared to do software correction on
all images. However: if you have trouble focusing your rangefinder, use the
EVF more, or are adapting lenses to your M 240 anyway, it may well make more
sense to go with the Sony option to gain some resolution – if the lenses
you want to use agree with the sensor.
Vs Olympus E-M1: Same size, same weight, very different image quality. Quite
a big difference in price, though; less so to the regular A7. The E-M1 has
three aces: firstly, its stabilizer is so good that you claw back most, if
not all, of the high ISO advantage of the A7 and A7R for handheld shooting
in low light. It also means that you don’t have stability issues – my ‘
technical’ hit rate with the E-M1 is close to 100% because of this. You can
shoot at pretty much any shutter speed with impunity. Ace number two is
weather sealing: I’m sure you’ve all seen [what I did to the E-M1 in the
shower]. The final, largest ace is the lens system: not only is the M4/3
lens system arguably the most mature mirrorless system with the greatest
diversity of options – the lenses were all designed specifically for
digital from the ground up. Even the kit lenses are pretty good, and the
excellent glass – like the [60/2.8 and 75/1.8] is really special by any
standards. This one is a tough choice, to be honest. I think it’s like
doing a present value calculation and trying to figure out a discount rate:
do you want images now, or later, and how’s your nerve (or how shaky are
your hands)?
Vs Sigma DP Merrills: Now, this is an interesting question: from previous
tests, we’ve determined that the D800’s sensor and a good lens will match
or slightly outresolve the DPMs. However, there are only three focal lengths
– 28, 45 and 75mm. The A7R’s native primes split the difference with 35
and 55mm. High ISO is unquestionably better with the A7R, you get a
viewfinder and much better ergonomics, and on top of that, there’s more
depth of field control, but if you need to stop down – the Sigmas handle
small apertures better with later onset of diffraction. Both have poor
battery life. An individual choice, I think.
Vs Sony A7: Perhaps the A7R’s biggest competition is going to be its
sibling. I haven’t said much about the A7, because I think the two cameras
are aimed at very different markets. The A7 has a much more forgiving sensor
and shutter mechanism; it will tolerate lower quality lenses, adaptors etc
and not show as much compromise at the pixel level due to its lower
resolution. It will focus faster due to PDAF. The files will be easier to
handle, etc. I suppose the answer boils down to your end intentions for the
files: are you chasing ultimate image quality for very large prints or not?
If the answer is no, then the A7 will probably be a better choice; you’ll
save money for glass, and won’t feel frustrated if your files aren’t
perfect. On the other hand, if you do print…you probably wouldn’t even be
asking.
，和E-M1比较，那么按1-10 scale来说：
对焦速度：Oly 10， A7R 6
对焦精度：Oly 9， A7R 6
追焦： Oly 7， A7R 5
acquisition time: Oly 10, A7R 7
blog.mingthein.com/2014/01/08/sony-a7r-review/
其他的summary：
Vs Nikon D800E: Here, it all boils down to the system of lenses and flashes:
if you need any special purpose gear at all, or longer lenses, then the
balance tips heavily in favor of the D800E. I think the shooting envelope is
a bit wider, too – given the much better shutter mechanism. Of course, if
you’re travelling on a strict weight budget, then I’d go with an A7R, 55mm
and Ricoh GR.
Vs Leica M 240: From what I understand from people who do use the A7R and M
glass, not all lenses are great; you need to try individual ones to see what
plays nice and what doesn’t. And be prepared to do software correction on
all images. However: if you have trouble focusing your rangefinder, use the
EVF more, or are adapting lenses to your M 240 anyway, it may well make more
sense to go with the Sony option to gain some resolution – if the lenses
you want to use agree with the sensor.
Vs Olympus E-M1: Same size, same weight, very different image quality. Quite
a big difference in price, though; less so to the regular A7. The E-M1 has
three aces: firstly, its stabilizer is so good that you claw back most, if
not all, of the high ISO advantage of the A7 and A7R for handheld shooting
in low light. It also means that you don’t have stability issues – my ‘
technical’ hit rate with the E-M1 is close to 100% because of this. You can
shoot at pretty much any shutter speed with impunity. Ace number two is
weather sealing: I’m sure you’ve all seen [what I did to the E-M1 in the
shower]. The final, largest ace is the lens system: not only is the M4/3
lens system arguably the most mature mirrorless system with the greatest
diversity of options – the lenses were all designed specifically for
digital from the ground up. Even the kit lenses are pretty good, and the
excellent glass – like the [60/2.8 and 75/1.8] is really special by any
standards. This one is a tough choice, to be honest. I think it’s like
doing a present value calculation and trying to figure out a discount rate:
do you want images now, or later, and how’s your nerve (or how shaky are
your hands)?
Vs Sigma DP Merrills: Now, this is an interesting question: from previous
tests, we’ve determined that the D800’s sensor and a good lens will match
or slightly outresolve the DPMs. However, there are only three focal lengths
– 28, 45 and 75mm. The A7R’s native primes split the difference with 35
and 55mm. High ISO is unquestionably better with the A7R, you get a
viewfinder and much better ergonomics, and on top of that, there’s more
depth of field control, but if you need to stop down – the Sigmas handle
small apertures better with later onset of diffraction. Both have poor
battery life. An individual choice, I think.
Vs Sony A7: Perhaps the A7R’s biggest competition is going to be its
sibling. I haven’t said much about the A7, because I think the two cameras
are aimed at very different markets. The A7 has a much more forgiving sensor
and shutter mechanism; it will tolerate lower quality lenses, adaptors etc
and not show as much compromise at the pixel level due to its lower
resolution. It will focus faster due to PDAF. The files will be easier to
handle, etc. I suppose the answer boils down to your end intentions for the
files: are you chasing ultimate image quality for very large prints or not?
If the answer is no, then the A7 will probably be a better choice; you’ll
save money for glass, and won’t feel frustrated if your files aren’t
perfect. On the other hand, if you do print…you probably wouldn’t even be
asking.
