Olympus seemed to go to a great deal of trouble attempting to deliver light to the sensor as close to 90deg as possible. Their stated reasons for doing so include reduced vignetting, increased sharpness edge to edge and reduced 'crosstalk/spill' from one photosite to the adjacent sites which should reduce fringing.

Recent tests in AP have mentioned that 'fringing' is indeed present when using the kit lenses on the E-410/510 and 420/520. I'm not sure if fringing has been mentioned in tests of FF/APS-C cameras but if it hasn't then it has to be assumed that it isn't present.

Likewise I've seen very little mention of either improved edge sharpness on 4/3rds models or reduced edge sharpness in FF/APS-C models.

Any views?