Hi res vs. normal length zooms
"Good" glass is good glass. Prime, zoom, whatever. Resolving power, contrast, edge and corner sharpness, low CA, color rendition, etc. Same old story. All depends on the application, as to what's "good".
Primes are easier to build, but that doesn't mean that they always produce higher "quality" shots.
The bigger you print, generally the farther away people will be when looking at it. Not many people are going to look at an 18"x24" from 2 inches away.
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