How much definition is enough for a good picture?

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LuisMartin New Member • Posts: 1
How much definition is enough for a good picture?
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Hello,

I have been an amateur in photography for some time now, but I still have a problem trying to define how much "definition" must a photo have in order to be good. I am referring to the central subject of the photo, where I have placed the focus. Once I zoom in 200% or 300% even 100% sometimes, the photo starts to show grain or pixels.

Different lenses, at different apertures and using different ISO's produce different results, yes, but I would like to know if there is a general rule of sorts, say that I use a prime lens like the Nikkor AF-S 50mm 1.8, I stop down the diaphragm to f7.1, handheld at a shutter speed of 1/500, at ISO 250, I find the right EV using ETTR to avoid burning the clouds. When I zoom in, the picture has grain, has lost definition. Similar things happen with 105mm micro AF-S or the Tamron 70-300mm f 4-5.6.

I have come to consider myself a very poor photographer. From a distance the photos are OK, but from very close, they are awful. I have read that depending on the viewer distance, so should be the definition, but I am sure I am doing something wrong that I can't find out on my own.

Any piece of advice, please?

Nikon D850, handheld. Nikkor 50mm AF-S, 1.8; ISO 250, f7.1 @1/500; ETTR about +1.3EV Automatic WB, cloudy

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Nikon D850
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