<span style="font-size: medium;"]I have finished my one week California trip, three-week China trip and another one week east US trip in the last two months. Now I'm back home and ready to share some camera experiences during my vacations. []


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<span style="font-size: medium;"]These three photos were shot in a reasonably lighted basketball gym with my 50D and 85/1.8 lens. I use the lens wide open and set my 50D at 6FPS with tracking AF enabled. The hit rate is quite good in my opinion on such a fast moving object. About 60% of my images are sharp on focus! I'm satisfied with this rate considering that I'm using a 85/1.8 wide open and the camera is trying to handle the AF in limited indoor lighting conditions. I only used the centre point for all the sport shots; but I don't think the performance will drop noticeably if I use other points, although I haven't fully tried.



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<span style="font-size: medium;"]On the other hand, I found that the AF performance has something to do with the path of the moving object. The hit rate is a little bit higher when the object moves horizontally from one side to another. When the object is moving towards or away from the camera, even at the same speed as the horizontal moves, the camera struggles a bit to cope with the move. But the hit rate is still quite acceptable. (some 40-50%). The Servo AF can also be fooled easily when some other player passes by in front of your object very quickly, this is totally understandable. However, I found that it always took half to one full second to refocus/re-track the subject that I'm intended to shoot. The refocusing speed depends on the distance, speed and moving direction of the subject, but the time spent on re-tracking the move will make you lose opportunities.



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<span style="font-size: medium;"]But overall, good job my 50D![]





[img]/cfs-file.ashx/__key/CommunityServer.Components.UserFiles/00.00.00.24.70.Forum+Use/IMG_5F00_2646.jpg[/img]


(50D + 85/1.8 @ 85mm, F1.8, 1/800s, ISO640, +2/3EV, Av mode)





[img]/cfs-file.ashx/__key/CommunityServer.Components.UserFiles/00.00.00.24.70.Forum+Use/IMG_5F00_2659.jpg[/img]


(50D + 85/1.8 @ 85mm, F1.8, 1/1000s, ISO640, +1/3EV, Av mode)





[img]/cfs-file.ashx/__key/CommunityServer.Components.UserFiles/00.00.00.24.70.Forum+Use/IMG_5F00_2701.jpg[/img]


(50D + 85/1.8 @ 85mm, F1.8, 1/800s, ISO640, +1/3EV, Av mode)





<span style="font-size: medium;"]Comments?[8-|]


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<span style="font-size: medium;"]Benjamin