That’s an interesting point, so I went and checked briefly on what used Canon lenses are going for, at an online dealer that specializes in such things. https:

That’s an interesting point, so I went and checked briefly on what used Canon lenses are going for, at an online dealer that specializes in such things. https://www.keh.com/shop/lenses/canon--canon-eos.html https://www.keh.com/shop/lenses/canon--canon-eos.html And whoa. None of that is cheap. So, my guess? It’s as you said: a lot of the market was APS-C cameras, like Canon Rebels or Nikon D3xxx. And those were overwhelmingly paired with the 18–55mm kit lenses, and then with either a 70–300, or perhaps an 18–250-ish superzoom. Most DSLRs were effectively welded to the lens that came in the box.