I have the Olympus E-620 with the Olympus 18 - 180 lens. It's painfully slow (understatement). Before I toss it on e-bay, does anyone else know if the issue is just the lens? Or has anyone had this problem and fixed it? Also- the flash works when it feels like it - maybe 3 out of 4 times when used alone and about 50% of the time with my studio lights (using Olympus Safe Sync). Thank you for any input / advice!