Originally posted by normhead Back in 1992 3 of the top 10 lenses in Pop Photography tests, which were optical bench tests were zooms. The whole zooms aren't as good thing is going on 40 years out of date. Some folks just haven't kept up.
There were oodles of folks walking around with camera bags full of primes, with not one top 10 lens that could match those three zooms. How out if it was that?
I'm not sure that this is really correct even now. I understand that there are resolution tests that can be performed on lenses which go well beyond what a camera sensor is capable of resolving, and that they show primes to be superior to even the best zooms. However, anyone can see that if such a test shows lens A to be superior to lens B but on a camera, whether in real-world use or lab/brick wall tests, they resolve to the same level, then it's an advantage that's not worth much and will have zero effect on photography performed with those lenses.
Where I can see such tests being relevant is in sample variation as it makes sense that such beyond-the-resolution-of-the-camera sharpness provides greater leeway in any given sample of the lens being good enough for use. It may even be that there is much less sample variation in a relatively simple prime than in a complex zoom, and this alone could potentially be responsible for primes being viewed as better than zooms - because at the end of the day we're talking about an average copy of lens A being compared to an average copy of lens B.
There are also other factors such as the plethora of cheap zooms. There aren't many cheap primes out there but there are millions and millions of cheap kit zooms, and this will lower the overall reputation of zooms. The cheapest primes are fastish (f/1-8 or slower) 50s and they're such easy to construct lenses with decades of refinement behind them that they're very sharp almost universally, much better than any kit 28-80 or 18-55.
I personally believe that in general primes are still better than zooms and, save any great advance in design or (more likely) manufacturing, they always will be. But are they so much better that they give noticeably better results in photography? I'm not so sure about that.
Lens design has progressed massively in the last ten years as a result of people bench-testing them on very high resolution digital cameras. We often complain about such people but we have a lot to thank them for.