Eh, if you want it, buy it, but the machine won't see the image, it is only the mechanical aspect of what you see. True, lenses can change perspective sometimes but still, it's you that sees the image. In 35mm, I have one lens and made it work for everything I did - and is was a prime lens at that. With another 35mm, I have 2 lenses and since the once covers prime, I don't use the prime much any more. $ is important, so if it straps me financially, I usually find another way. With Medium Format, I have 2 lenses and an extension tube and those cover most of what I like to do except macro. Getting into LF now, two lenses on the way and from there I will see... Maybe I'm a minimalist, or maybe too frugal, or maybe just not into sales-people. I dunno, but I like the stuff I get and I do appreciate good tools and workmanship.