are my cannon zoom lenses compatible to the new Cannon EOS Rebel T3i

[CBush]

We are thinking about buying a cannon EOS Rebel T3I and need to know if the lenses we had from our cannon EOS Rebel 2000 will work on it of do we need to purchase newer zoom lenses.  We have a Cannon Zoom Lens EF 75-30mm 1:4-5.6 and a Cannon Zoom Lens EF 35-70mm 1:3.5-45 A. Any help would be appreciated.

[Skirball]

Yes, both are EF lenses and are compatible with any EOS camera [thought the EOS M mirrorless require an adapter).

[CBush]

Thank you for your response I appreciate it.

[pjmacd]

Yes, your old lenses will work with a Rebel T3i. They were designed for a 35mm film camera, and since the Rebel T3i has a sensor that is smaller than a frame of 35mm film, the effective focal length of the lenses will increase by a factor of 1.6. So, for example, your 35-70mm lens will have effective focal lengths of 56-112 mm.