Panasonic DC-GH6 Sensor Measurements at PhotonsToPhotos

SrMi wrote:

dbateman wrote:

Funny Valentine wrote:

hmmm, what a disaster for Panasonic... GH6 scores worse than the OM-1 and and last gen EM1-2 and 3...

You don't seem to know how to read that graph. This is quite good for a very fast front side illuminated higher resolution sensor optimized for video. If anything the OM-1 isn't looking quite as good as it should. The Em1mk2 needs to be corrected to the right 1/3 a stop due to gain choices. The stacked nature of the Om-1 semsor is hurting significantly any gains from being BSI, and its still very slow read out sensor compared to even the GH6.

I can see why now Panasonic choose this sensor over the Sony stacked BSI one. Its better.

OM-1’s readout speed is much faster than GH6’s (8ms vs. 18ms, source DPR).

Nope that’s not correct the camera can produce 75 fps raw 16 bits file

dbateman wrote:

Funny Valentine wrote:

hmmm, what a disaster for Panasonic... GH6 scores worse than the OM-1 and and last gen EM1-2 and 3...

You don't seem to know how to read that graph. This is quite good for a very fast front side illuminated higher resolution sensor optimized for video. If anything the OM-1 isn't looking quite as good as it should. The Em1mk2 needs to be corrected to the right 1/3 a stop due to gain choices. The stacked nature of the Om-1 semsor is hurting significantly any gains from being BSI, and its still very slow read out sensor compared to even the GH6.

I can see why now Panasonic choose this sensor over the Sony stacked BSI one. Its better.

FYI the sensor readout of the OM1 is 120fps, the fastest in M43. The GH6 is only 75fps.

JakeJY wrote:

dbateman wrote:

Funny Valentine wrote:

hmmm, what a disaster for Panasonic... GH6 scores worse than the OM-1 and and last gen EM1-2 and 3...

You don't seem to know how to read that graph. This is quite good for a very fast front side illuminated higher resolution sensor optimized for video. If anything the OM-1 isn't looking quite as good as it should. The Em1mk2 needs to be corrected to the right 1/3 a stop due to gain choices. The stacked nature of the Om-1 semsor is hurting significantly any gains from being BSI, and its still very slow read out sensor compared to even the GH6.

I can see why now Panasonic choose this sensor over the Sony stacked BSI one. Its better.

FYI the sensor readout of the OM1 is 120fps, the fastest in M43. The GH6 is only 75fps.

I thought I had read that the ‘effective’ readout was significantly reduced because of the sensor PDAF….could be remembering wrong??

JakeJY wrote:

dbateman wrote:

Funny Valentine wrote:

hmmm, what a disaster for Panasonic... GH6 scores worse than the OM-1 and and last gen EM1-2 and 3...

You don't seem to know how to read that graph. This is quite good for a very fast front side illuminated higher resolution sensor optimized for video. If anything the OM-1 isn't looking quite as good as it should. The Em1mk2 needs to be corrected to the right 1/3 a stop due to gain choices. The stacked nature of the Om-1 semsor is hurting significantly any gains from being BSI, and its still very slow read out sensor compared to even the GH6.

I can see why now Panasonic choose this sensor over the Sony stacked BSI one. Its better.

FYI the sensor readout of the OM1 is 120fps, the fastest in M43. The GH6 is only 75fps.

Readout in fps depends on bit depth and pixel count

120x20.2x12=29088

75x25x16=30000

If you drop the bit depth to 12 bits you get 100 fps at 25 megapixels if you bin downwards you get to the same point

The camera have different objectives and design principles and can't really be compared

jrsforums wrote:

JakeJY wrote:

dbateman wrote:

Funny Valentine wrote:

hmmm, what a disaster for Panasonic... GH6 scores worse than the OM-1 and and last gen EM1-2 and 3...

You don't seem to know how to read that graph. This is quite good for a very fast front side illuminated higher resolution sensor optimized for video. If anything the OM-1 isn't looking quite as good as it should. The Em1mk2 needs to be corrected to the right 1/3 a stop due to gain choices. The stacked nature of the Om-1 semsor is hurting significantly any gains from being BSI, and its still very slow read out sensor compared to even the GH6.

I can see why now Panasonic choose this sensor over the Sony stacked BSI one. Its better.

FYI the sensor readout of the OM1 is 120fps, the fastest in M43. The GH6 is only 75fps.

I thought I had read that the ‘effective’ readout was significantly reduced because of the sensor PDAF….could be remembering wrong??

The sensor readout is 1/121 in readout mode 1-a through ISO 12800. It switches to a 1/60 readout speed at ISO 16000 (probably readout mode 2-a). The faster readout mode is one to the things that makes the PDAF better than the E-M1s and allows the 50fps with focus and exposure in Sh2 mode.  If you just want exposures you can get 120 frames a second with fixed focus and exposure.

SrMi wrote:

Interceptor121 wrote:

SrMi wrote:

dbateman wrote:

Funny Valentine wrote:

hmmm, what a disaster for Panasonic... GH6 scores worse than the OM-1 and and last gen EM1-2 and 3...

You don't seem to know how to read that graph. This is quite good for a very fast front side illuminated higher resolution sensor optimized for video. If anything the OM-1 isn't looking quite as good as it should. The Em1mk2 needs to be corrected to the right 1/3 a stop due to gain choices. The stacked nature of the Om-1 semsor is hurting significantly any gains from being BSI, and its still very slow read out sensor compared to even the GH6.

I can see why now Panasonic choose this sensor over the Sony stacked BSI one. Its better.

OM-1’s readout speed is much faster than GH6’s (8ms vs. 18ms, source DPR).

Nope that’s not correct the camera can produce 75 fps raw 16 bits file

Thanks for the correction, what DPR wrote here seems incorrect. It should be 8ms vs. 13ms.

I think he is referring to rolling shutter which for the GH6 in video is 12.7ms

But the cameras are not comparable

The GH6 is a premium video camera that takes some photos. The OM-1 is a still camera that takes some video

Interceptor121 wrote:

SrMi wrote:

Interceptor121 wrote:

SrMi wrote:

dbateman wrote:

Funny Valentine wrote:

hmmm, what a disaster for Panasonic... GH6 scores worse than the OM-1 and and last gen EM1-2 and 3...

You don't seem to know how to read that graph. This is quite good for a very fast front side illuminated higher resolution sensor optimized for video. If anything the OM-1 isn't looking quite as good as it should. The Em1mk2 needs to be corrected to the right 1/3 a stop due to gain choices. The stacked nature of the Om-1 semsor is hurting significantly any gains from being BSI, and its still very slow read out sensor compared to even the GH6.

I can see why now Panasonic choose this sensor over the Sony stacked BSI one. Its better.

OM-1’s readout speed is much faster than GH6’s (8ms vs. 18ms, source DPR).

Nope that’s not correct the camera can produce 75 fps raw 16 bits file

Thanks for the correction, what DPR wrote here seems incorrect. It should be 8ms vs. 13ms.

I think he is referring to rolling shutter which for the GH6 in video is 12.7ms

But the cameras are not comparable

The GH6 is a premium video camera that takes some photos. The OM-1 is a still camera that takes some video

I was remembering some of the numbers wrong. The OM-1 is a faster sensor.

Gh6 can do 14 fps mechanical shutter, 75 fps full sensor read out saved at full resolution, full sensor uncropped read out of 120 fps but saved as 4k.

OM-1 can do 10 fps mechanical shutter,  120 fps saved at full resolution,  but only electronic flash sync of 1/100 seconds.

I was remembering the 1/100 electronic flash sync of yhe OM-1 vs the 120 fps 4k read out for the GH6.  Obviously not the same thing.

SrMi wrote:

Interceptor121 wrote:

SrMi wrote:

Interceptor121 wrote:

SrMi wrote:

dbateman wrote:

Funny Valentine wrote:

hmmm, what a disaster for Panasonic... GH6 scores worse than the OM-1 and and last gen EM1-2 and 3...

You don't seem to know how to read that graph. This is quite good for a very fast front side illuminated higher resolution sensor optimized for video. If anything the OM-1 isn't looking quite as good as it should. The Em1mk2 needs to be corrected to the right 1/3 a stop due to gain choices. The stacked nature of the Om-1 semsor is hurting significantly any gains from being BSI, and its still very slow read out sensor compared to even the GH6.

I can see why now Panasonic choose this sensor over the Sony stacked BSI one. Its better.

OM-1’s readout speed is much faster than GH6’s (8ms vs. 18ms, source DPR).

Nope that’s not correct the camera can produce 75 fps raw 16 bits file

Thanks for the correction, what DPR wrote here seems incorrect. It should be 8ms vs. 13ms.

I think he is referring to rolling shutter which for the GH6 in video is 12.7ms

But the cameras are not comparable

The GH6 is a premium video camera that takes some photos. The OM-1 is a still camera that takes some video

I agree though I think that GH6 will be an excellent landscape camera, especially with HR on a tripod.

Don't hold your breath we were looking at the measurements and keeps being weird!

Raist3d wrote:

Not entirely surprised. Panasonic clearly is prioritizing video with this camera.

I don't know at this point if they plan to prioritize their MFT line for stills. But hey Panasonic, a well designed modern successor to the GM5, maybe now that APSC/FF mirrorless have approached the MFT size, maybe sells better now?

Quite possibly.

Or maybe Panasonic thinks that stills shooters should purchase one of their FF cameras? The S5 is smaller than the GH6. And it takes wonderful quality stills.

Of course, the S lenses are not smaller, at least the telephoto ones.

Interceptor121 wrote:

The camera have different objectives and design principles and can't really be compared

The GH6 is a premium video camera that takes some photos. The OM-1 is a still camera that takes some video

This is the main take-home message. They are for different purposes.

Interceptor121 wrote:

JakeJY wrote:

dbateman wrote:

Funny Valentine wrote:

hmmm, what a disaster for Panasonic... GH6 scores worse than the OM-1 and and last gen EM1-2 and 3...

You don't seem to know how to read that graph. This is quite good for a very fast front side illuminated higher resolution sensor optimized for video. If anything the OM-1 isn't looking quite as good as it should. The Em1mk2 needs to be corrected to the right 1/3 a stop due to gain choices. The stacked nature of the Om-1 semsor is hurting significantly any gains from being BSI, and its still very slow read out sensor compared to even the GH6.

I can see why now Panasonic choose this sensor over the Sony stacked BSI one. Its better.

FYI the sensor readout of the OM1 is 120fps, the fastest in M43. The GH6 is only 75fps.

Readout in fps depends on bit depth and pixel count

120x20.2x12=29088

75x25x16=30000

Under ISO 800 it doesn't look to have anything that requires 16 bit. From the results, it looks like that would even fit in 10 bit (the results from latitude test are consistent with the G95 in 10-bit mode, perhaps even a bit worse).

If you drop the bit depth to 12 bits you get 100 fps at 25 megapixels if you bin downwards you get to the same point

The camera have different objectives and design principles and can't really be compared

When it's doing the dual output gain the stream into the ISP may be even more than 16 bits total, but that is hardly relevant to the max fps the sensor can do. I doubt your claim it can do 100 fps at 25MP in 12 bit, as Panasonic does not offer that mode at all.