I'd say it is a bit more than that, the constant aperture lenses are better quality. Although you can get a Canon pro L lens that has variable aperture across the zoom range, I don't think you can get the better grade glass from Sigma or Tamron without buying the constant aperture zooms or primes.
#6195876, By neilch Lens Advice
neilch 741 posts
Seen 10 months ago
Registered 9 years ago