GX8 v G6 long exposures at night

Astrotripper wrote:

Jorginho wrote:

I understand you want to show us the differences and the differences are clear.

mFt sensors have not gained even 1 stop over the past 9 years when we look at noise.

So which is it?

All mFts "is it".

This example really demonstrates the difference very clearly. Bump that exposure time even more, and the difference will be even greater (and amp-glow will start showing its ugly head as well).

I see a difference, I do not see 1 stop difference (subjective like hellof course).

Not per DxO and not what we see here where G6 represents the typical mFT sensors 2008-2012.

DxO does not measure dark current, which is the predominant noise source at long exposures like that.

I use G1, GH2, EPL5, GH4 and have used them all for either aurora borealis and noctilucent clouds. EPl5 and GH4 (Sony vs Panny) was actually a win for the latter in the exact same situation if only slight. I think the Panny retains colours and tonality a bit better (RAW) and noise too. It seems thought that beyond 15 seconds the Sony does better.
GH2, EPl5 and GH4 are reasonably similar for low light noise but EPl5 and GH4 indeed are somewhat better. I wonder if the difference reaches significance.

That is my personal experience which remains in line with DxO.

And the differences between Panasonic and Sony sensors in this regard are huge, as demonstrated here.

Nonsense. You cannot attribute this to Panny vs Sony since one uses 2010 tech and the other 2015 tech.

So an E-M10 for example, will perform much better at long exposures than most Panasonic cameras except the ones I mentioned earlier.

Well not for 8s exposures where EPL5 does not do anything better than a Gh4 and in fact does worse.

And the difference is much bigger that what DxO or other noise measurements done in "normal" conditions would let you believe.

Beyond 15 seconds may be. At shorter exposures that is not the case.

BTW, the Nex-3 you mention, is actually one of the best APS-C cameras in terms of handling dark current, and would leave both of the Panasonics in the dust for shots of this kind.

So. How does this help mFts. A 2010 APS-c that does much better according to you....
I feel mFts can gain a lot when it comes to noise these days. May be new organic sensors will solve this, may be BSI tech or somehting else. I hope so.