p.1 #1 · The sensor read-out times on the A7Cxx cameras?
Does anyone know the sensor read-out times on the A7Cxx cameras? Given the different sensors and resolutions, I assume they are different for each model, including the original A7C.
p.1 #2 · The sensor read-out times on the A7Cxx cameras?
It’s around 66ms (1/15th sec) for the A7CII for the full sensor readout and a slower 98ms (1/10th sec) on the A7CR.
For video you need to be more specific as it will depend on resolution/ cropping etc.
In general both are slow for readout speed, the A7CR in particular.
p.1 #3 · The sensor read-out times on the A7Cxx cameras?
Tora_2097 wrote:
It’s around 66ms (1/15th sec) for the A7CII for the full sensor readout and a slower 98ms (1/10th sec) on the A7CR.
For video you need to be more specific as it will depend on resolution/ cropping etc.
In general both are slow for readout speed, the A7CR in particular.
Does shooting in MRaw or other compressed formats have any effect on this?
p.1 #4 · The sensor read-out times on the A7Cxx cameras?
cxpics wrote:
Does shooting in MRaw or other compressed formats have any effect on this?
Those are the same readouts as the A7IV and A7rIV and V. I believe for mRaw, the camera is downsampling an original image from the full sensor, so the readout is the same. Same with compressed formats.
For APS-C mode though, it does affect readout speed. I've seen the A7IV estimated at 1/75s (based on video specs), which is probably safe to extrapolate to the A7cII. Not sure what it is for A7rV.
p.1 #6 · The sensor read-out times on the A7Cxx cameras?
grahamgibson wrote:
Those are the same readouts as the A7IV and A7rIV and V. I believe for mRaw, the camera is downsampling an original image from the full sensor, so the readout is the same. Same with compressed formats.
For APS-C mode though, it does affect readout speed. I've seen the A7IV estimated at 1/75s (based on video specs), which is probably safe to extrapolate to the A7cII. Not sure what it is for A7rV.
I think that 1/75s value for aps-c video is 12-bit, so full 14bit aps-c stills will be slower.
p.1 #9 · The sensor read-out times on the A7Cxx cameras?
I believe I saw 1/240 for the A1, 1/120 for the A9 and maybe 1/15 for the A7Rv, was looking during the
"mechanical shutter" discussions. I'd expect the 1/15 of the A7Rv for the A7CR.
The gist of it is that A7CII is marginally slower than A7IV in full frame video modes, but marginally faster in APS-C video modes (because the crop is slightly bigger). Those differences are so small that they should not be visible in actual usage...
p.1 #11 · The sensor read-out times on the A7Cxx cameras?
Tora_2097 wrote:
It’s around 66ms (1/15th sec) for the A7CII for the full sensor readout and a slower 98ms (1/10th sec) on the A7CR.
For video you need to be more specific as it will depend on resolution/ cropping etc.
In general both are slow for readout speed, the A7CR in particular.
I think these times nail it.
Do you know the times for the A1, A9, the A7III, and the A7r3? It would be great to have them all.
p.1 #12 · The sensor read-out times on the A7Cxx cameras?
Jim Kasson estimated the A9 at 1/150. Interestingly, he also measured the full mechanical shutter at a bit less than 1/300s (and displaying a degree of bend as the shutter accelerates). The A1 approaches that with 1/240, which I assume is why Sony elected to only have an EFCS. Though I even wonder about the need for that.
It will be nice when Sony gets to the point where the fast-readout sensors' price point becomes low enough for a full e-shutter compact camera, hopefully allowing them to slim down the body again.
So compressed raw + slow continuous mode gets you fairly useable electronic shutter. Saying that I use electronic in full 14-bit raw almost exclusively and very rarely get any distortion even with moving subjects. Obviously it's not a sports camera!
p.1 #14 · The sensor read-out times on the A7Cxx cameras?
Tora_2097 wrote:
It’s around 66ms (1/15th sec) for the A7CII for the full sensor readout and a slower 98ms (1/10th sec) on the A7CR.
For video you need to be more specific as it will depend on resolution/ cropping etc.
In general both are slow for readout speed, the A7CR in particular.
So basically shooting anything aside from still subjects (architecture/landscapes) with electronic shutter isn't possible?
p.1 #15 · The sensor read-out times on the A7Cxx cameras?
jaygould wrote:
So basically shooting anything aside from still subjects (architecture/landscapes) with electronic shutter isn't possible?
That wasn't my experience when I took two A7C bodies traveling or to photograph my grandchildren. As I understand it, it is not a matter of subject blur, as one gets with a shutter speed as slow as 1/14th of a second. It is a matter of subject displacement during the time the shutter is reading from line to line and most photographic targets, alive or otherwise, don't displace or move that far in 1/14th of a second, so there is not a problem in terms of seeing any bending or distortion. A swinging golf club or a swinging baseball bat is another matter.
p.1 #16 · The sensor read-out times on the A7Cxx cameras?
jaygould wrote:
So basically shooting anything aside from still subjects (architecture/landscapes) with electronic shutter isn't possible?
It absolutely is. I shoot my toddler exclusively in electronic shutter and had some problems with movement distortion with the R series but not with lower res bodies like the A7iv or A7iii/A7C. Yes you notice it occasionally if they're doing a really rapid movement with arms or legs closer to the camera but not nearly as often as the internet would have you think. It's very, very useable.
p.1 #17 · The sensor read-out times on the A7Cxx cameras?
newdom wrote:
It absolutely is. I shoot my toddler exclusively in electronic shutter and had some problems with movement distortion with the R series but not with lower res bodies like the A7iv or A7iii/A7C. Yes you notice it occasionally if they're doing a really rapid movement with arms or legs closer to the camera but not nearly as often as the internet would have you think. It's very, very useable.
Yes, it needs to be a rapid movement of the subject (typically distorted limbs/head/whatever moved at the time) or the camera. I also got it occasionally with my kids on A7III.
p.1 #18 · The sensor read-out times on the A7Cxx cameras?
grahamgibson wrote:
The A1 approaches that with 1/240, which I assume is why Sony elected to only have an EFCS. Though I even wonder about the need for that.
I think it's for that 1/400s (1/500s APS-C) flash sync...
p.1 #19 · The sensor read-out times on the A7Cxx cameras?
Tora_2097 wrote:
It’s around 66ms (1/15th sec) for the A7CII for the full sensor readout and a slower 98ms (1/10th sec) on the A7CR.
For video you need to be more specific as it will depend on resolution/ cropping etc.
In general both are slow for readout speed, the A7CR in particular.
I'm not good with math, but how much slower is the a7CR's sensor compared to the a7C II?
How does the a7R III's sensor compare despite being lower resolution? Is it slower or faster than the a7CR?
Given the 60 MP was first introduced with the a7R IV, has the sensor read speed improved with the a7CR?
p.1 #20 · The sensor read-out times on the A7Cxx cameras?
grahamgibson wrote:
Jim Kasson estimated the A9 at 1/150. Interestingly, he also measured the full mechanical shutter at a bit less than 1/300s (and displaying a degree of bend as the shutter accelerates). The A1 approaches that with 1/240, which I assume is why Sony elected to only have an EFCS. Though I even wonder about the need for that.
It will be nice when Sony gets to the point where the fast-readout sensors' price point becomes low enough for a full e-shutter compact camera, hopefully allowing them to slim down the body again.
I agree. I'm really hoping sensor read speed gets to a point where Sony can release an e-shutter-only camera for the masses and give good results!
. Unfortunately it's 1/10s for full frame 14bit stills.