Hi,
The Xti uses the same lenses as the most recent Canon APS-c cameras, such as Rebel T5i or the new 7d2. It uses all the Canon EF and EF-s lenses.
As for batteries, you can still buy them, though you probably don't need a spare battery.
I like to shop at B&H or Adorama, which are probably the biggest two online camera stores.
For just a few bucks more you could get a used T2i or a bit more than that gets you a new T3i, both of which have better sensors, if that is in your budget.
Good luck.
Scott
Canon 5d mk 4, Canon 6D, EF 70-200mm L f/2.8 IS mk2; EF 16-35 f/2.8 L mk. III; Sigma 35mm f/1.4 "Art" EF 100mm f/2.8L Macro; EF 85mm f/1.8; EF 1.4x extender mk. 3; EF 24-105 f/4 L; EF-S 17-55mm f/2.8 IS; 3x Phottix Mitros+ speedlites
Why do so many people say "FER-tographer"? Do they take "fertographs"?
