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 Re: Official: Sony A7C II, A7CR and FE 16-35mm f/2.8 GM II | |
chiron wrote:
Ayoul wrote:
MRK2019 wrote:
Fred Miranda wrote:
Regarding the A7C II, Sony only indicates "YES" for the EFCS options, without any ON/OFF distinction mentioned (you can check the image). Therefore, according to Sony, only the A7CR model comes with a complete mechanical shutter.
I’m totally confused. I was thinking of ordering the A7CR as a second camera for travel purposes and for times when I want to take a smaller kit with me
I have some fast glass and I’d like to know which kind of shutter the A7CR really has.
It is solely mechanical up to 8000/s or does it have mechanical shutter only upto 4000/s and then the remainder up to 8000 is EFSC? Some people have also mentioned the mechanical shutter on these new cameras is not real or full mechanical. In which way is the shutter different?
What impact will either shutter have on bokeh for faster lenses and at which shutter speed might it become visible?
If anyone has some A7C example photos showing this then that would help me understanding the problem.
Cheers
Matt
On dpreview, they claim that there is no mechanical first curtain on the A7CR. I tend to believe that it's true, like it was true for the previous A7C that I own. If it's like the A7C :
- EFCS in "mechanical" shutter, at every shutter speed, not just the fastest. There is simply no mechanical first curtain
- Full electronic shutter
In EFCS, it can theoretically have an impact on the banding / flickering compared to a faster full mechanical shutter, and it does have a well documented impact at fast shutter speed on the quality of the bokeh. No problem with the bokeh on full electronic mode, but here of course come the numerous problems linked to a slow readout speed (rolling shutter, banding, flickering), all of them more intense than in EFCS.
Any impact on bokeh of EFCS requires both of two conditions: Very large maximum aperture (1.2 or 1.4) and very high shutter speed (at least 1/1000th of a second, many say more than 1/2000th). Mark Galer's opinion is that even under those circumstances that the impact is slight and not worth worrying about.
Well it seems to be an issue for me to worry about, as I shoot a lot of outside portraits in sunny conditions. I have fast primes and like to shoot them wide open, that is why I bought them. My 35 and 50 f1.4 GM lenses at ISO 100 on a bright "Sunny 16" days will shoot wide open at 1/6,400 to 1,8000ss, my 3 Sigma I series f2 primes will be at 1/3,000 to 1,4000ss and my Sony 55mm f1.8 will fall somewhere in-between.
Marks suggestion to shoot at ISO 50 does not solve the issue, my GM's will still be at 1/4,000ss and the Sigma's at 1/2000ss, still over the 1,000ss threshold where the issue starts. I hope that Sony has resolved this issue and it turns out that this is not a problem. I was ready to buy an A7Cr to add to my A7RIV, but right now for me, both new A7C models are a no-go just for this reason.
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