My Canon A95 has a max aperture of 2.8. My Olympus kit lens has a max aperture of 3.5. Since (3.5/2.8) squared = 1.56 my canon lens is half stop faster than the olympus. Does this mean the point and shoot has better low light performance with a given ISO? If the olympus iso 1600 has the same noise level as canon iso 400. Which means two stop better. And the olympus IBIS give you half stop advantage. Does this mean the olympus is 2 + 0.5 - 0.5 = 2 stops better in low light performance than the canon? Obviously other factor also affect image quality but I just want to quantify the low light performance.