@Qwerty7 wrote:
From what I've read regarding the S20 ultra's autofocus issues, they are down to the massive sensor. Because of that, they had to get rid of the Dual Pixel autofocus that has been there since the s7 just for the higher 108mp and this led to worse autofocus issues. I do not own and will never own any 108mp device but from my knowledge of cameras I can say the focusing issues cannot just be fixed by a software update.
Sorry but you are wrong. The sensor is massive and that can be an autofocus problem. But the fact that the sensor is big is not the cause why the dual pixel is missing. Dual pixel is missing because the 108mpx are still so small that you cannot use the 2 sides of the pixel to focus so you have to rely on a pdaf sensor which uses 30 per cent of the sensor instead of 100 per cent like dual pixel.
Since it is a phone the sensor is still small compared to a full frame pdaf camera and so the 30 per cent focusing area is just too small to get a quick focus.
The problem in the end is the 108mpx, a 48mpx would have got away with that, bigger overall pixels at 48mpx, the much better tetracell instead of nonacell binning and the possibility to implement dual pixel.
Furthermore embedding more pixels does not mean taking better pics, so they went for the 108mpx number instead of the 48 or 12 because chickens will see a high number and will buy it, and there are a lot since people still think that the s7 to s10 cameras are bad because they have few mpx when in reality they have been the best ones of their years.
Well, marketing pidgeons also believe that the s7 has the same sensor of the s10 because it is 12mpx but that is a whole yet funny story to tell.
In the end the fact of using a 48 mpx sensor with dual pixel is what makes the p30 and p40 pros focus very fast, because huawei could implement dual pixel. Both sensors are smaller than the the s20U sensor but they do not show those problems (don't be fooled however by huawei marketing in reality the sensor on the p40 is the same on the p30 in fact the p40 of those 50mpx only uses a square of 48mpx which is the same size of the p30 sensor, the edges are used for video stabilisation and if you manipulated the software to let you see what the device os hides in the prewiew you would notice that the edges of that sensor cannot be put in focus in fact the sensor size past the p30 size is already too big to be put in focus in a smartphone, so in the future expect more marking about bigger sensors when in reality the phone uses only a small portion of it due to physical limits and no one will tell you that.)
Do not fall victim to marketing and inform yourselves guys,it is the only way to get good products at reasonable price instead of having manufacturers charge a lot for bad products.
