Why can RX1RII do uncompressed RAW continuous but A7RII can't?

[digitalphotographer]

I've been wondering about this question but can't seem to find an explanation. Does anyone know?

 

[JimKasson]

I've been wondering about this question but can't seem to find an explanation. Does anyone know?

The a7RII can do uncompressed raw in continuous shutter mode. It just does it with 12-bit precision.

Jim

 

[digitalphotographer]

I've been wondering about this question but can't seem to find an explanation. Does anyone know?

The a7RII can do uncompressed raw in continuous shutter mode. It just does it with 12-bit precision.

Jim

Thanks for the answer but sorry for the confusion, I meant why can't A7R2 do so in 14-bit too (I can't seem to change the title after I posted the topic)

 

[JimKasson]

I've been wondering about this question but can't seem to find an explanation. Does anyone know?

The a7RII can do uncompressed raw in continuous shutter mode. It just does it with 12-bit precision.

Jim

Thanks for the answer but sorry for the confusion, I meant why can't A7R2 do so in 14-bit too (I can't seem to change the title after I posted the topic)

There has been a lot of speculation about that. My guess is that Sony can't run the ADC's fast enough in 14 bit mode.

Are you sure the RX1RII can do 14 bits in continuous mode? I don't have one so I can't test it.

Jim

BTW, it looks like you did manage to change the title.

--
http://blog.kasson.com

 

[balazer2]

It's limited by the sensor read-out speed. It could do 14 bits, but more slowly and with more rolling shutter skew.

 

[digitalphotographer]

I've been wondering about this question but can't seem to find an explanation. Does anyone know?

The a7RII can do uncompressed raw in continuous shutter mode. It just does it with 12-bit precision.

Jim

Thanks for the answer but sorry for the confusion, I meant why can't A7R2 do so in 14-bit too (I can't seem to change the title after I posted the topic)

There has been a lot of speculation about that. My guess is that Sony can't run the ADC's fast enough in 14 bit mode.

Are you sure the RX1RII can do 14 bits in continuous mode? I don't have one so I can't test it.

Jim

BTW, it looks like you did manage to change the title.

Good point. I just recalled it can do continuous in 14-bit after reading all the reviews and random forums making this claim without actually showing definitive proof.

Someone please send Jim an RX1R2 so we can get to the bottom of this?

 

[digitalphotographer]

It's limited by the sensor read-out speed. It could do 14 bits, but more slowly and with more rolling shutter skew.

Are you confirming that RX1R2 can do 14bit in continuous?

 

[JimKasson]

I've been wondering about this question but can't seem to find an explanation. Does anyone know?

The a7RII can do uncompressed raw in continuous shutter mode. It just does it with 12-bit precision.

Jim

Thanks for the answer but sorry for the confusion, I meant why can't A7R2 do so in 14-bit too (I can't seem to change the title after I posted the topic)

There has been a lot of speculation about that. My guess is that Sony can't run the ADC's fast enough in 14 bit mode.

Are you sure the RX1RII can do 14 bits in continuous mode? I don't have one so I can't test it.

Jim

BTW, it looks like you did manage to change the title.

Good point. I just recalled it can do continuous in 14-bit after reading all the reviews and random forums making this claim without actually showing definitive proof.

Someone please send Jim an RX1R2 so we can get to the bottom of this?

Actually, all I need is an uncompressed raw file from an RX1RII exposed in continuous shutter mode.

Jim

 

[digitalphotographer]

I've been wondering about this question but can't seem to find an explanation. Does anyone know?

The a7RII can do uncompressed raw in continuous shutter mode. It just does it with 12-bit precision.

Jim

Thanks for the answer but sorry for the confusion, I meant why can't A7R2 do so in 14-bit too (I can't seem to change the title after I posted the topic)

There has been a lot of speculation about that. My guess is that Sony can't run the ADC's fast enough in 14 bit mode.

Are you sure the RX1RII can do 14 bits in continuous mode? I don't have one so I can't test it.

Jim

BTW, it looks like you did manage to change the title.

Good point. I just recalled it can do continuous in 14-bit after reading all the reviews and random forums making this claim without actually showing definitive proof.

Someone please send Jim an RX1R2 so we can get to the bottom of this?

Actually, all I need is an uncompressed raw file from an RX1RII exposed in continuous shutter mode.

Jim

 

[JimKasson]

I've been wondering about this question but can't seem to find an explanation. Does anyone know?

The a7RII can do uncompressed raw in continuous shutter mode. It just does it with 12-bit precision.

Jim

Thanks for the answer but sorry for the confusion, I meant why can't A7R2 do so in 14-bit too (I can't seem to change the title after I posted the topic)

There has been a lot of speculation about that. My guess is that Sony can't run the ADC's fast enough in 14 bit mode.

Are you sure the RX1RII can do 14 bits in continuous mode? I don't have one so I can't test it.

Good point. I just recalled it can do continuous in 14-bit after reading all the reviews and random forums making this claim without actually showing definitive proof.

Someone please send Jim an RX1R2 so we can get to the bottom of this?

Actually, all I need is an uncompressed raw file from an RX1RII exposed in continuous shutter mode.

Internet, come on already. Jim is waiting

It can be any old picture in continuous mode, but if you're going to do one just for me, leave the lens cap on, set the ISO to 640, the shutter to 1/2000, and stop the lens all the way down.

Jim

 

[digitalphotographer]

I've been wondering about this question but can't seem to find an explanation. Does anyone know?

The a7RII can do uncompressed raw in continuous shutter mode. It just does it with 12-bit precision.

Jim

Thanks for the answer but sorry for the confusion, I meant why can't A7R2 do so in 14-bit too (I can't seem to change the title after I posted the topic)

There has been a lot of speculation about that. My guess is that Sony can't run the ADC's fast enough in 14 bit mode.

Are you sure the RX1RII can do 14 bits in continuous mode? I don't have one so I can't test it.

Good point. I just recalled it can do continuous in 14-bit after reading all the reviews and random forums making this claim without actually showing definitive proof.

Someone please send Jim an RX1R2 so we can get to the bottom of this?

Actually, all I need is an uncompressed raw file from an RX1RII exposed in continuous shutter mode.

Internet, come on already. Jim is waiting

It can be any old picture in continuous mode, but if you're going to do one just for me, leave the lens cap on, set the ISO to 640, the shutter to 1/2000, and stop the lens all the way down.

Jim

I would capture one immediately if I have access to one. Just curious, what's the reason for these settings?

 

[digitalphotographer]

It can be any old picture in continuous mode, but if you're going to do one just for me, leave the lens cap on, set the ISO to 640, the shutter to 1/2000, and stop the lens all the way down.

Jim

Hi Jim, it's been a couple of weeks but we still haven't heard from anyone in the Sony FF forum so I posted this request for RX1RII files shot in continuous mode in the Cybershot series forum where more owners of RX1RII probably hang out, hope you don't mind. Thanks in advance.

 

[JimKasson]

It can be any old picture in continuous mode, but if you're going to do one just for me, leave the lens cap on, set the ISO to 640, the shutter to 1/2000, and stop the lens all the way down.

Jim

Hi Jim, it's been a couple of weeks but we still haven't heard from anyone in the Sony FF forum so I posted this request for RX1RII files shot in continuous mode in the Cybershot series forum where more owners of RX1RII probably hang out, hope you don't mind. Thanks in advance.

Sure. I'm not in a hurry, though I am curious.

jim

 

[JimKasson]

I've been wondering about this question but can't seem to find an explanation. Does anyone know?

The a7RII can do uncompressed raw in continuous shutter mode. It just does it with 12-bit precision.

Jim

Thanks for the answer but sorry for the confusion, I meant why can't A7R2 do so in 14-bit too (I can't seem to change the title after I posted the topic)

There has been a lot of speculation about that. My guess is that Sony can't run the ADC's fast enough in 14 bit mode.

Are you sure the RX1RII can do 14 bits in continuous mode? I don't have one so I can't test it.

Good point. I just recalled it can do continuous in 14-bit after reading all the reviews and random forums making this claim without actually showing definitive proof.

Someone please send Jim an RX1R2 so we can get to the bottom of this?

Actually, all I need is an uncompressed raw file from an RX1RII exposed in continuous shutter mode.

Internet, come on already. Jim is waiting

It can be any old picture in continuous mode, but if you're going to do one just for me, leave the lens cap on, set the ISO to 640, the shutter to 1/2000, and stop the lens all the way down.

Jim

I would capture one immediately if I have access to one. Just curious, what's the reason for these settings?

To get a look at the read noise at the point right after the a7Rii changes conversion gain with ISO.

That would give me a good clue as to whether the sensor is indeed the same as in the a7RII.

jim

--
http://blog.kasson.com

 

[cjgent]

I've been wondering about this question but can't seem to find an explanation. Does anyone know?

The a7RII can do uncompressed raw in continuous shutter mode. It just does it with 12-bit precision.

Jim

Thanks for the answer but sorry for the confusion, I meant why can't A7R2 do so in 14-bit too (I can't seem to change the title after I posted the topic)

There has been a lot of speculation about that. My guess is that Sony can't run the ADC's fast enough in 14 bit mode.

Are you sure the RX1RII can do 14 bits in continuous mode? I don't have one so I can't test it.

Good point. I just recalled it can do continuous in 14-bit after reading all the reviews and random forums making this claim without actually showing definitive proof.

Someone please send Jim an RX1R2 so we can get to the bottom of this?

Actually, all I need is an uncompressed raw file from an RX1RII exposed in continuous shutter mode.

Internet, come on already. Jim is waiting

It can be any old picture in continuous mode, but if you're going to do one just for me, leave the lens cap on, set the ISO to 640, the shutter to 1/2000, and stop the lens all the way down.

Jim

I would capture one immediately if I have access to one. Just curious, what's the reason for these settings?

To get a look at the read noise at the point right after the a7Rii changes conversion gain with ISO.

That would give me a good clue as to whether the sensor is indeed the same as in the a7RII.

jim

--
http://blog.kasson.com

Taken as requested

https://dl.dropboxusercontent.com/u/458255/DSC00027.ARW

--
Instagram @cjgent

 

[Bobobears]

It's limited by the sensor read-out speed. It could do 14 bits, but more slowly and with more rolling shutter skew.

Are you confirming that RX1R2 can do 14bit in continuous?

?

 

[JimKasson]

I've been wondering about this question but can't seem to find an explanation. Does anyone know?

The a7RII can do uncompressed raw in continuous shutter mode. It just does it with 12-bit precision.

Jim

Thanks for the answer but sorry for the confusion, I meant why can't A7R2 do so in 14-bit too (I can't seem to change the title after I posted the topic)

There has been a lot of speculation about that. My guess is that Sony can't run the ADC's fast enough in 14 bit mode.

Are you sure the RX1RII can do 14 bits in continuous mode? I don't have one so I can't test it.

Good point. I just recalled it can do continuous in 14-bit after reading all the reviews and random forums making this claim without actually showing definitive proof.

Someone please send Jim an RX1R2 so we can get to the bottom of this?

Actually, all I need is an uncompressed raw file from an RX1RII exposed in continuous shutter mode.

Internet, come on already. Jim is waiting

It can be any old picture in continuous mode, but if you're going to do one just for me, leave the lens cap on, set the ISO to 640, the shutter to 1/2000, and stop the lens all the way down.

Jim

I would capture one immediately if I have access to one. Just curious, what's the reason for these settings?

To get a look at the read noise at the point right after the a7Rii changes conversion gain with ISO.

That would give me a good clue as to whether the sensor is indeed the same as in the a7RII.

Taken as requested

https://dl.dropboxusercontent.com/u/458255/DSC00027.ARW

--

That's a 12-bit file.





Noise is about the same as for an a7RII. It is very likely that it's the same chip.

Jim

--

the last word the last word - Photography meets digital computer technology. Photography wins -- most of the time.

Photography meets digital computer technology. Photography wins -- most of the time.

blog.kasson.com

 

[JimKasson]

It's limited by the sensor read-out speed. It could do 14 bits, but more slowly and with more rolling shutter skew.

Are you confirming that RX1R2 can do 14bit in continuous?

?

It cannot.



Thanks to cjgent for the file.

Jim

--
http://blog.kasson.com

 

[digitalphotographer]

Thanks Jim for finally putting this question to rest. Do you have a moment to explain how you came to this conclusion by looking at the charts? I have no background in engineering so not sure what I'm looking at. Thanks in advance.

Are you confirming that RX1R2 can do 14bit in continuous?

?

It cannot.



Thanks to cjgent for the file.

Jim

--
http://blog.kasson.com

 

[JimKasson]

Thanks Jim for finally putting this question to rest. Do you have a moment to explain how you came to this conclusion by looking at the charts? I have no background in engineering so not sure what I'm looking at. Thanks in advance.

Well, I'm thinking you must know something about engineering, or you wouldn't care if the precision is 12 bits or not.

But I'll try to assume little prior knowledge.

The raw histogram, in the case of the one below, produced by RawDigger, is similar in concept to the histogram on the back of your camera, but this one is far more detailed and tells you how many raw pixels, not aRGB or Adobe RGB pixels, have each possible value. The RX1RII advertises it'self in the EXIF as a 14 bit camera, and we are looking at a section of the 14-bit histogram of a dark-field image. In such an image, the read noise is the only thing contributing to the histogram. Averaged over the entire image, the read noise histogram has a bell-shaped appearance. What is striking about this histogram is that there is data only every fourth possible 14-bit raw value. This pattern is characteristic of 12-bit data that has ben cast into 14-bit form, so that the last two bits are always zero.

Make sense?

Are you confirming that RX1R2 can do 14bit in continuous?

?

It cannot.



Thanks to cjgent for the file.

Jim

--
http://blog.kasson.com

--

the last word the last word - Photography meets digital computer technology. Photography wins -- most of the time.

Photography meets digital computer technology. Photography wins -- most of the time.

blog.kasson.com