Another question to ask is are you using an i9500 or i9505? I believe they use different sensor?
I have i9505 and camera in normal lighting is awesome. A little grainy in low light but not as bad as the camera in my HTC legend.
Anti-shake on here, not sure if there is any significant advantage.
Sent from my GT-I9505 using xda app-developers app
Update: 17th november 2013
Samsung G S4 stock BMG4 + root
with cf-auto root + philz recovery.
HTC Desire HD
(Hboot 2.00.0029 AND S-OFF)
SVHD V 2.1.0
Retired HTC Legend