Pen-F : the best Olympus ever for image quality ?

Jorginho wrote:

1) You say Fuji and Sony should perform roughtly the same since they use the same substrate. Which I agree with and it is correct.
But these sensors have a different array. One Bayer, the other Xtrans so that is a clear difference and it means colours are treated differently.
2) What I do not agree with is that when it comes to GX8 and PenF, which we know both IM279 we see a huge difference when it comes to colour sensitivity.

I think it's the IMX 269 used in the GX8 and Pen F.

Noise, tonal range and dynamic range are within 1/3 of a stop.

Colour sensitivity between the two amounts to 1 stop at ISO200 (ISO200 on GX8 CS = ISO400 DR on PenF) and from that point onwards the gap widens to an enormous size.
CS at ISO3466 on GX8 is 14,3 bits. ISO11200 on PenF is marginally lower at 13,9 bits. That is at least, from the graph 1,5 stops.

Now you say Olympus puts some special sauce on it. Well...it cannot be both. You cannot say Sony A6500 and Fuji are roughly the same so we can take A6500 as a proxy whereas this absurd difference between PenF and GX8 is attributed to "some special sauce" by Olympus.

Now here is the corrected version where ISO180 value becomes the nonexistant ISO91.

That seems far more logical given these are the exact same sensors...

If there was a ISO91 value I would not have argued. But it is missing where it is not in the other graphs. Moreover you will find no sensors that are exactly the same that have such an enormous gap all along the ISO range...

I have looked at imaging resource which are JPGs though...But I see no colour difference at all between PenF or Em1.2. I can't read what seems to be Japanese looking at the characters but these look like JPGs too.

But now we do have the RAWs from dpreview. And if anything it seems like GX8 retains its colours a bit better at high ISO than the PenF. Look at the yellows in the various places for instance. GX8 has somewhat deeper colours.

Finally....our friends over at mirrorless comparisons have a quicky between GX8 and PenF...And apart from a different white balance there is no difference to be found in their output (RAW)

GX8 vs PenF