Re: Sony A9III - Thoughts from bird and fast action shooters
QuietOC wrote: Maxxus46 wrote:
Agreed. Going from 50mpx to 24mpx is startling....
No, no way.
6,000 pixels x 4,000 pixels vs 8,640 x 5,760 pixels
2,640/6,000 = 44% increase
People can barely see a difference when doubling linear resolution (see 2k to 4k video for instance). There is no way that a 44% increase in linear resolution is startling.
The computation and storage requirements though can be noticed.
Even this is still not the most accurate way of thinking about it
If the pixel pitch and sensor tech were kept the same (this means the sensor size is increased) and the resolution increased from 6,000 x 4,000 to 8,640 x 5,760, then yes you will get that 44% increase in linear resolution
However, here we are increasing pixels but decreasing the pixel pitch, with an Imperfect lens so the situation is completely different!
The math I did suggests a 30% increase in linear resolution with lens quality equivalent to the center of a good prime (50/1.4GM, and a 14% increase in linear resolution using the resolution on the edge of a good prime, and 22% for the center of a good zoom (70-200Gmii) between the A1 and A9iii
This is not to say a 30% increase is not significant, it probably is, 30% is the difference between a 18x24 and 24x36” print
You would have to go from a A6700 to A7RV (similar pixel pitch) with lenses that has similar optical characteristics on both sensors to be able to claim a ~50% increase in linear resolution just by dividing pixel widths
Re: Sony A9III - Thoughts from bird and fast action shooters
QuietOC wrote: Maxxus46 wrote:
Agreed. Going from 50mpx to 24mpx is startling....
No, no way.
6,000 pixels x 4,000 pixels vs 8,640 x 5,760 pixels
2,640/6,000 = 44% increase
People can barely see a difference when doubling linear resolution (see 2k to 4k video for instance). There is no way that a 44% increase in linear resolution is startling.
The computation and storage requirements though can be noticed.
Even this is still not the most accurate way of thinking about it
If the pixel pitch and sensor tech were kept the same (this means the sensor size is increased) and the resolution increased from 6,000 x 4,000 to 8,640 x 5,760, and the lens is optically perfect then yes you will get that 44% increase in linear resolution
However, here we are increasing pixels but decreasing the pixel pitch, with an Imperfect lens so the situation is completely different!
The math I did suggests a 30% increase in linear resolution with lens quality equivalent to the center of a good prime (50/1.4GM, and a 14% increase in linear resolution using the resolution on the edge of a good prime, and 22% for the center or a good zoom (70-200Gmii) between the A1 and A9iii
Dec 04, 2023 at 09:56 PM
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