Is there any good reason why the aperture was set to 4.5 and not 2.8?
Is there any good reason why the aperture was set to 4.5 and not 2.8?
Looks like he was shooting in Tv, so the camera just set the aperture at 4.5 to get the proper exposure for 1/250.
Originally Posted by Oren
I usually get better results with Tv at night shoots. If you set Av and F/2.8, you may get shutter speeds (especially in the end zones and near the sidelines) too slow to stop motion blur. I also find F/2.8 establishes a depth-of-field so shallow that I can't keep two players in focus if the run shoulder-to-shoulder parallel to my shooting position.
Everything at night is a compromise... Her's an Av shot with the lens wide open.
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XTi, EF70-200MM F/2.8 L IS USM @ 200MM, Av, F/2.8, ISO-1600, 1/160