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Sony A7r sensor not the same
- Thread starter Guy Mancuso
- Start date
k-hawinkler
Well-known member
With both D800E and A7R files I use CS6 and the latest ACR, but do all sharpening and noise reduction in Nik. Seems to work very well. I also use the clarity slider to bring out detail. Nik also handles well the noise generated by that.
That is one of my major complaints. I too would prefer to have an option the way my D700 gives me.
My settings for iso 100 & high frequencies shot (in C1):
Sat +4
Clarity neutral +8 to +12 (max) to prevent too much tonal transitions alteration
Structure +2
Sharpness +300/0,4/0,6
NR L15/C12
Lower frequencies are then sharpened in CS5 after post prod & resizing
mjm6
Member
It may be, and that is a real concern...
I believe it is only possibly an issue for B&W shooting, and I intend to do some shooting to test the camera out soon in this respect. Maybe this weekend.
---Michael
Guy Mancuso
Administrator, Instructor
My setting on sharpening is pretty much the same as the D800e 200/.6/1
clarity around 10
NR I drop down to like 15L/color 20
I also usually add about 3 points of black for punch
Saturation i dont usually add any.
Im still playing with these settings
glenerrolrd
Workshop Member
I thought the Sony pipeline was lossy …..the raw files are all the same size ….isn t that how you can tell .
So Sony says the A7R sensor is newer than the D800/E yet they have identical test scores at DxO ? I am sure they customized the micro lens and updated the in camera processor but the actual sensor board itself sure seems the same .
The largest concern seems to be that the in camera processing is applying changes to the raw files . Great for out of the camera results but maybe not what you would want for all situations .
So Sony says the A7R sensor is newer than the D800/E yet they have identical test scores at DxO ? I am sure they customized the micro lens and updated the in camera processor but the actual sensor board itself sure seems the same .
The largest concern seems to be that the in camera processing is applying changes to the raw files . Great for out of the camera results but maybe not what you would want for all situations .
This is possible Sergio -- I should have clarified the A7r BEHAVES as though it has an AA and requires MORE sharpening and clarity than the D800...
Mark,
Different raw processor, but same requirement is what led me to assert it does indeed behave as though it has an AA...
And this could possibly explain why we need more sharpening -- ??? -- need to noodle on this one a bit more...
Depends in what you mean by lossy. Anybody have a raw file of a simple target or step wedge I might look at?
Roger, any of these are problematic and could explain why the files need more processing than D800 non-E files to look "their best."
I don't have enough technical mojo to gauge whether it is a real issue or not but I am a firm believer that I, as owner of camera, should be given freedom to decide whether something matters to me and how I want it set so I will strongly vote that Sony should give us freedom how we want our RAWs compressed (lossy, losless, or none at all), just like Nikon does.
Sony, are you listening?
dchew
Well-known member
Here you go:
https://www.hightail.com/download/elNLL0dOOW41bmdUWThUQw
a7r, Zeiss 35mm f/2 w/Metabones III adapter.
1/8 sec @ f/2, ISO 50. This is as sharp as I could get the focus zoomed in 14x. Gitzo w/arca swiss D4.
Jack's comments are interesting to me; I get the same impression. At 100% I do not see the same level of sharpness I expect. [del]Raw files from the 5DII[/del] and from my Alpa/IQ180 are both better. BTW, it doesn't get all that much better as I stop down.
Is this because:
1. The shutter shake problems? I've been looking for the classic double image effect, which isn't there. But maybe this movement is completely random, causing a general,slight fuzzyness?
2. I'm at the lens's limits w/ this sensor and pixel size?
3. It is just too hard to focus precisely on this sensor with the relatively short throw vs. large format lenses I'm used to on the Alpa.
??
I will post another at f/4, and one from my 90 TS @ f/2.8 in a few minutes. Please note I did not make any effort to even out the lighting; the map center is brighter because it is brighter, not just from vignetting.
Dave
Last edited:
Dave,
Bob has some special tools to dig inside the raw file with -- it will be interesting to hear what he learns
Re image crispness, I agree with you. So far, I have not seen any A7r image with any lens combo that appears as sharp/crisp as similar D800/D800E shots, so I rule out lenses. They do sharpen up, but like the D800 seem to take a heavier-handed approach than the D800E. If the camera does not have an AA filter or there is not anything added to the Bayer matrix to alleviate aliasing, then one has to assume a vibration issue.
One thought, and this one is way out there, but lends to the vibration issue: One way to attenuate aliasing without an AA filter proper, would be to allow the sensor to 'wiggle' around 0.2 ~ 0.4 pixel in it's mounts during exposure. My gut says this isn't the case, rather the issue with vibration -- and perhaps the overall effect we are seeing -- is the camera has such a low mass it simply cannot overcome the shutter vibration at any speed.