giga said:
I've got a local guy offering me $900 for a D90, 18-105 VR (with a hoya pro1). Good to go? 18-105 can be sold for ~250?
count on 200 or so. if it's in great shape, low clicks, thorough test reveals no issues (including focus test), and he'll give you the original receipt, i'd say go for it. it's about the same as a good refurb deal.
There's a lot more to L lenses than just great edge-to-edge sharpness. They often will be the fastest lens you can buy, autofocus is often faster/more accurate, and the build quality is vastly superior to most EOS lenses. Personally, I feel the lens coatings are worth the money but I know not everyone thinks as highly of it. Besides, L lenses are a very good investment because they hold their value incredibly well.
are the non-L lenses built that poorly? i haven't heard of any major issues, except for the usual focus/QC type stuff that seems to be equally true (if not more so) for the L line.
"fastest in the world" is meaningless if you know what you're doing and shooting fairly typical subjects.
i haven't seen any evidence that L lenses hold their value any better than other lenses (it's about the same).
faster AF i'll give you, but more accurate AF seems pretty unlikely given the evidence i've seen and the fact that AF accuracy is simply more important for faster lenses. any gain you may get is eaten up by the fact that tolerances get significantly smaller.
finally, the major build differences (sealing, more metal, etc) are pretty much meaningless if you're not shooting in antarctica professionally or something. you're better off buying a lens that costs 1/2 to 1/3 as much and just buying a replacement if you manage to munge it so badly that it's not worth repairing.
before anyone gets the wrong idea, i'm not saying L lenses are worthless; on the contrary canon makes some excellent lenses (of all stripes). what i'm saying is that the L lenses are highly specialized lenses and it's silly for an amateur to blow, say, 1500$ on a 135/2.0 when not only is he (and it inevitably is a he) on a crop camera (and will be for years longer now that he's blown thousands on an L lens), but isn't interested in portrait photography in the least. in this crazy but all too common situation, the only thing the (now very) poor photographer in question gains over say a 75-300/3.5-5.6 IS or 70-200/4 iS is the ability to do beautiful subject isolation for portraits (albeit from very very far away); meanwhile, he loses IS, zoom range, and a thousand extra dollars.
hence, the only thing i see these lenses accomplishing for the average photographer is the enrichment of canon.
There really is a divide though when it comes to photographers. You've got the gear heads and then you've got the ones that are purely into photography as an art form. I feel that I'm smack dab in the middle of the two.
so was ansel adams. it's a good place to be.