No idea about Nikon's next roll-outs. I am not very techy, http://nikonrumors.com/ is the best place to check. From what I can tell the D7000 sort of surprised the pundits and has them guessing at whats next.
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I have recently started the transition from Film to Digital. I shot (almost) exclusively Canon film cameras.
When I went looking for a Digital replacement for my Canon A1, I found that my older lenses would not mount on the Canon Digital cameras.
I chose Nikon digital because nikon has not changed the lens mount for many years and therfore I believe that my Nikon lenses will mount on any future Nikon camera I may buy.
Nikon, on the other hand has
1) Manual focus lenses
2) Lenses that focus by the body turning a screw
3) Lenses with electronic focus (like Canon)
4) Lenses for crop cameras
Some of the best Nikon lenses are in category #2, from what I understand. The entry level cameras will mount those lenses but not focus them.
While I don't know a lot about cameras I do know there are two big differences. The Nikon has better "glass" Their lenses are superior.
But Cannon cameras are historically more reliable.
Don't know from where you're getting info. I've had Nikons for 26 yrs and not a single failure. Hell, i've had a F2 and a F3 drop due to a strap failures and picked them up and continued shooting. My d100 was knocked off of a table and operates as if new to this day.
While I don't know a lot about cameras I do know there are two big differences. The Nikon has better "glass" Their lenses are superior.
But Cannon cameras are historically more reliable..