Do Vintage Canon Primes Still Deliver Better Portraits Than Modern Lenses?

I recently conducted a portrait photography experiment that many of you have probably wondered about yourselves: can a 20-year-old Canon EF f/1.2 prime really outperform its modern RF replacement?

This question comes up constantly in photography forums and communities. Plenty of working portrait photographers still swear by their older EF lenses, adapting them to newer Canon bodies rather than upgrading to the latest RF versions. The reason? They claim the rendering—that intangible quality of how a lens interprets skin tones and facial features—simply can’t be replicated by newer glass.

I decided to test this belief directly.

Setting Up the Comparison

For this side-by-side portrait shoot, I used:

  1. A Canon EF f/1.2 prime (the classic model that’s been discontinued for years)
  2. An adapter to mount it on a current Canon RF body
  3. The equivalent modern RF f/1.2 replacement lens
  4. The same lighting conditions and camera settings for both lenses

The goal was straightforward: shoot identical portraits under controlled conditions and compare the results objectively.

What I Discovered

The results surprised me—but not in the way you might expect.

Both lenses produced stunning portraits. However, the differences I observed were subtle rather than dramatic. The older EF lens did render skin tones with a particular warmth that some photographers find beautiful and forgiving. The newer RF lens, by contrast, offered slightly sharper details and more consistent optical correction across the frame.

Neither lens was objectively “better.” Instead, they each brought different aesthetic qualities to the work.

What This Means for Your Photography

This experiment reinforces something important I’ve learned over years of testing equipment: lens choice is deeply personal. Here’s what I’d recommend:

  1. Recognize that vintage glass has character—this isn’t a weakness; it’s often intentional
  2. Understand modern corrections—newer lenses reduce optical aberrations more aggressively
  3. Test before upgrading—if your current lenses work for your style, there’s no urgent need to replace them
  4. Consider your workflow—adapters add cost and bulk, which might offset any optical advantages
  5. Focus on technique first—lighting, posing, and composition matter far more than which f/1.2 you’re using

The Bottom Line

If you own older Canon EF primes and love how they render, keep using them. If you’re considering upgrading to RF glass, know that you’re gaining modern conveniences and consistency, not necessarily better image quality for portrait work.

The best lens is ultimately the one you’ll actually use—and that produces images aligned with your artistic vision.