I'm kinda confuse with this one.

They say APS-C has 1.6 crop factor (Canon Camera) and 1.5 crop factor (Nikon Camera)
I have XTi and my question is : does EF-S lens comply to 1.6 crop factor too? or just for EF Lens.

Because after a while using EF-S lens @ 50mm focal length i feel that what i see in viewfinder @ that focal length is the same as i see with my eyes (since they say what you see through viewfinder @ 50mm focal length is the same with what your eyes see). if EF-S comply to crop factor, what i see through viewfinder @ 50mm focal length should be different with what i see with my eyes

thank you for helping me.