Maybe \"lemon\" is not a right word...maybe \"not well calibrated at wideopen\"
That is the only reason the center point is being shift. Yes, i do understand this optical phenomenon very well. I have used 50L day in day out for last three years and i have not ran into this focus shift thing with my shots when using center AF sensor with 5D2 and 1Ds2. Not only just the AF, i am also able to manual focus the 50L using the view finder and Eg-S screen with any aperture at any subject distance and the confirmation of center sensor. This process can not be done with VF if this optical phenomenon/focus shift does exists with my 50L lenses.
Maybe \"lemon\" is not a right word...maybe \"not well calibrated at wideopen\"
That is the only reason the center point is being shift. Yes, i do understand this optical phenomenon very well. I have used 50L day in day out for last three years and i have not ran into this focus shift thing with my shots when using center AF sensor with 5D2 and 1Ds2. Not only just the AF, i am also able to manual focus the 50L using the view finder and Eg-S screen with any aperture at any subject distance with the confirmation center sensor. This process can not be done with VF if this optical phenomenon/focus shift does exists with my 50L lenses.
Maybe \"lemon\" is not a right word...maybe \"not well calibrated at wideopen\"
That is the only reason the center point is being shift. Yes, i do understand this optical phenomenon very well. I have used 50L day in day out for last three years and i have not ran into this focus shift thing with my shots when using center AF sensor with 5D2 and 1Ds2.
Not just the AF, i am also able to manual focus the 50L using the view finder and Eg-S screen with any aperture at any subject distance with the confirmation center sensor. This process can not be done with VF if this optical phenomenon/focus shift does exists with my 50L lenses.
Nov 30, 2012 at 04:22 AM
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