Non L glass vs L glass
I just acquired another prime lens for my R8: the RF 50 f1.4 VCM, as I didn’t have a 50mm prime in my collection. It’s the fastest lens I own and seemed a bit extravagant, but I need it for low light event work when even 1.8 struggles and I don’t like raising the ISO too high. It seemed like a good opportunity to test all of my RF lenses on a tripod to compare sharpness in Lightroom.
My current lens collection includes a mix of non-L and L glass: RF 24 1.8 Macro, RF 35 1.8 Macro, RF 50 1.4 L VCM, RF 85 f2 Macro, RF 100 2.8 L Macro, and RF 70-200 f4 L.
What surprised me is just how sharp all of this glass is, even the budget primes. I could not tell a difference between the 35 1.8 and 50 1.4 when compensated for distance to subject due to different focal lengths, at least when stopped down to 2.8. They are both tack sharp and the difference is imperceptible. The same could be said for the 70-200 f4 at 70mm compared to the 50 VCM. And the 85 f2 vs. the 100 f2.8.
I honestly think there’s no justification of buying L lenses for image quality alone. If you are shooting in low light, or shooting moving subjects, and have a particular need for f1.4 or f1.2, or need specialist features for a particular purpose like weather sealing or macro, then obviously you need the right tool for the job. The extra stops of light gathering of faster primes will be useful for low light as you will have less noise and cleaner photos, and they might be a tiny bit sharper when wide open, but stopped down there is no difference. And that’s pixel peeping on a MacBook screen at 100%.
I was tempted to get the RF 35 F1.4 VCM as well but I don’t think I’ll bother. The 1.8 is that good.
Just my thoughts.