Canon introduced the EOS system and lens mount in 1987. It shows no signs of going anywhere - you can bet on L glass being around awhile, and you can bet an L offering bought in 1987 will still perform fantastic on a 2009 body. Nikon, on the other hand, fell right into this situation with the line devotion to DX and then the recent release of FF - incompatibility and poor IQ abounds. Lenses designed for a crop sensor perform poorly on FF.
Any specific examples of "poor IQ abounds"? Last I knew Canon users were buying Nikkor 14-24s and modding them for EF mount because it is so good. Canon makes plenty of lenses (all of them labeled EF-S I believe?) as well which do not cover the full frame. L lenses are not for everyone, and fool is the man who thinks it's his L lenses that are making his pictures good.
Good point - personally though, I find Canon's distinction in their naming convention an awful lot easier to follow. If it's L, it's solid. Take for example, a very popular, very solid lens by Canon:
70-200 F2.8L IS - Or, the Nikon equivalent (I think...)
AF-S VR Zoom-Nikkor 70-200mm f/2.8G IF-ED
Uhhhhh. Yeah. I like L. It's pretty simple. Not to say you can't learn the Nikon naming convention, but Canon hasn't fiddled around with their lens lineup like Nikon did. If you buy L, it's going to look good on FF or crop.
You could cut off all the extra tags from the Nikon too and get it about as short. The real code for Canon's lens is EF 70-200 F2.8L IS USM BTW- not that different than Nikon's offering.
I don't really see where the Nikon naming is any more confusing, DX lenses for DX bodies, and FX lenses for FX or DX bodies. Canon has it exactly the same: EF-S lenses for crop bodies, and EF lenses for crop or FF bodies. I do amit though Canon has marketed their lenses well with easily discernible red rings and white barrels. Anyways, I am spending a lot more time shooting than I am looking through the lens catalog (at least I try to keep it that way!).
Despite my opinions on Nikon, I can't argue that one is ultimately better than the other. They're both on the top of the game, you can't really 'go wrong' with one or the other, I just think Canon has the whole experience tightened up more than Nikon does.
That's your opinion and there's no problem with that. I found Nikon's camera to be more intuitive to operate when I picked up my D80. Back then Canon had the edge in high ISO but I still went Nikon because I felt the camera handled much better and more intuitively. My point was that both systems are great and at this point it really is just about what you feel more comfortable with.
Re: "downgrading" to the D40, there really is nothing wrong with it. I used to think having the built in AF motor was a big deal too but when's the last time Canon made a lens that is not USM? Or Nikon releasing a non-AFS lens? I believe the most recent one was the 10.5mm DX fisheye, which is 5 or 6 years old. If you stick to recent releases or future new glass, it's all going to be AFS (or USM) from here on out.
If a shooter does not utilize high burst speeds then what is the point of having it? The imaging chain of the D40 is equal to the higher end bodies of its era- the image quality is the same.
Most importantly, if he feels the D40 is lighter and more usable then it's 100% the right camera to use. There is nothing more useless than the camera you left behind because it was too heavy, or the camera you leave in the bag because you're afraid to pull it out. The D40 in the hand outshoots the D3x in the car/house every time. It's not about the gear it's about the pictures. A good photographer holding an iPhone can shoot a novice holding a D3x into the ground 9 times out of 10.
Ruahrc