hans98ko
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 p.5 #13 · p.5 #13 · Is it worth buying a Nikon d850 for wildlife in 2022? | |
@CanadaMark
I am with you all the way except for the part for running at a higher clock speed.
The reason for some to perceived that the D5 or D500 is running or locking onto focus faster than the D850 is because of the larger D850 file size, heavier work load on the image processor (and filling the buffers faster thus the delay for continuous shooting) which you have explained clearly. I truly doubt that either the D5 or D500 is running at a higher clock speed because it will bring in another variable and that is heat, which will increase digital noise and will be a negative rather than a positive advantage. This is based on all else are being equal.
But to be frank we are really splitting hairs here because it is almost impossible for anyone to be able to tell the difference between 1/1000s to 1/1125s, that is about 10%, or go a little more extreme 1/1000s to 1/1250s at 20%. The delay between shots will be confined by the frame per second (fps) we have selected. And this will never go higher than 20fps for electronic shutter, which means 1/20 of a second. That will be more than enough for acquiring focus in good light for continuous tracking. I don't think anyone can tell if one camera is acquiring focus faster than the other with a shutter speed of let's say 1/1000s and an interval of 1/20 of a second. How do we know which is causing which? Delay due to acquiring focus or the fps interval holding it back, but still falling well within the interval. The next thing is proper settings on the camera will also make a difference like someone already mentioned here. AFFT, AF Mode, AF Points, exposure mode, WB...all make a difference. More preset settings require less computation and processing because it has already been defined.
Then there is the difference in AF motor speed for different lenses even for the same made and model.
The more I think about it the more I said to myself that it sure is difficult to pinpoint the source.
I used 1/1000s because we are talking about shooting something that is moving fast like airplanes, birds and cars (ABC).
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Regarding heat though, the D5 should be able to cool itself better than either of the smaller bodies. We see this in the Z9 as well, and to a much higher degree as it can shoot 4K/120 and 8K/60 internally which generate a lot of heat. They can use the extra body size to turn the camera into a giant heat sink basically.