I read on a website/blog that the long telephoto lenses from Canon has periodical updates for the software built into the lens. First off, I never thought that there is actual programming inside a lens much less updating of the software in it. Is it all nonsense or do people with teles send their lenses back into Canon for updates?
I am very curious about this. Hope someone can help clear this up (as I have a 300mm f2.8 Mk1 and never went into service centre for years).