With sports, shooting with a 400mm lens, you will need to crop accordingly. A 30Mpx file is easier to crop and still maintain enough data to clean up noise and retain detail, and still have something you can print pretty large.
With a 20Mpx sensor, not so much. I would have to add a 1.4x to the mix, and then that just bumps up my ISO another stop, and now my image is a bit worse.
So no, one cannot just say 20 is enough and if more is enough, then 40 or more is then needed, the world, and gear selection, and types of captures just aren't so black and white.
There are also many reasons a higher resolution file is very useful, cropping is just one of them.
Jan 08, 2020 at 02:20 PM
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