GH4, G9, RX10 IV comparison at ISO 6400

ThePhilosopher wrote:

JakeJY wrote:

I noticed you used a faster shutter speed on the G9, which probably negates some of the advantage.

Yes, I was in A mode. The SS was fluctuating between 200-250. I have several images at 200 that look the same. However, those I had different settings for the picture profile so wanted to match that up. My conclusion was exactly the same.

Also the GH4 has a 16MP. Did you normalize the pictures to the same size? If you are comparing per pixel level, the G9 is 20MP and that gives it another hit.

Nope, these are SOOC. However, to me the 20 should be able to give equivalent or better results SOOC.

RX10 IV does have BSI, which might help it up to 1/3 of a stop (theoretically).

So far in casual use I have found the RX10 IV to 98% give equivalent performance to the GH4. The BSI clearly performs better as it enables the smaller sensor to behave similarly to the larger sensor. Every torture test I throw at it and compare to the GH4 the RX10 IV seems to either come out equal or win. If I can find the image I'll post my comparison of a test board I made between it, the GH4, and the A7III. I was surprised at how well it did.

For what I shoot I need about another 2 stops to be happy as I need to freeze action. There isn't a camera available today with the right size that meets my needs. Clearly I could go FF, but then I need a larger lens for zoom. I am guessing if Sony releases a high end APSC with the BSI sensor I will finally be able to hit my performance/size specification. However, I am guessing they don't do this until September and I am not a big fan of their APSC form factor.

Them being JPEGs makes it a bit more difficult to do a pure sensor comparison (as the amounts of sharpening and noise reduction applied varies and plays a factor in JPEGs).

However, if you direct your attention to the Clorox logo on the clog remover bottle and where it says "From the makers of Clorox products" there is a very clear winner. This was the only part in the picture that is somewhat dark and has some detail that can be used to compare.

I was looking at general noise profile as it mimics what I see for skin tones and general quality under some of the lighting conditions I shoot in. Believe it or not the gray background is a good predictor and tells me how much I will be able to push the sensor if I decide to shoot RAW and post process. If I look at that background I see lots of grain that looks equivalent. I also have several images in which the G9 seems to perform worse, but I chose not to publish as the fluorescent lighting and timing of the photo plays a role.

Sony a73 with the new Tamron 28-75 2.8 sure seems to fit the bill: https://www.bhphotovideo.com/c/product/1393332-REG/tamron_a036_28_75mm_f_2_8_di_iii.html