Originally Posted By: mlord

With the best modern cameras, a 1/2 stop increase in ISO (what the graphs suggested) has near-zero effect on quality. And the suggestion that depth-of-field is adversely affected to a large degree, is just that: an unproven suggestion.


I agree that a 1/2 stop increase is probably not significant. However I would bet that losing off-axis lightrays is going to affect depth of field. You can't lose that much light without it affecting something.