Query...


Are the outer focus point's/sensors on a Canon Rebel Xsi just as sharp as the centre focus point? The majority of the time I shoot with thecentre focus point, but as of late I have been shooting more often with the outer focus points for portraits wherebyangling the camera in the vertical position. I have noticed that the images are not as sharp compared to the photos taken with the centre focus point. This is where I wish I had the 7D as all points are cross-type.


Someone has confirmed that ther centre focus point would be at at least 2x sharper if not more than the outer focus points but was wondering if anyone here can confirm this.


Also...my focus screen seems to be, for lack of a better term, scratched (removed a couple of times for cleaning)and would like to know if this may potentiallycause issues with focus lock?


As per usual, I thank thee for any opinions/recommendations.