This doesn't seem sharp to me...

Started 10 months ago | Discussions thread
Dylan Johnson
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Re: This doesn't seem sharp to me...
In reply to Lee Jay, 10 months ago

ljfinger wrote:

CaptiVision Photography wrote:

Morris Sullivan wrote:

The front of the hat is sharp as could be. You can see definite blurring by the time you get to the face.

Maybe by the time I focused and actually captured the image, he was moving slightly so would that cause the focus to be shifted ?

That's why you use AI-Servo.

However, look in the manual.  It says the first shot in AI-servo isn't likely to be sharp.

This is because AI-Servo takes a few samples to lock onto a subject and calculate it's position, velocity and acceleration, and then to use that data to predict where there subject will be when the shutter is released.

The way to mitigate this is to put it in AI-Servo, move the AF-activation to the thumb (* or AF on, depending on camera), then hold it down while you are framing, and make sure you keep that point on the part of the subject you want to be sharp (the eye, in this case).  This can work even with crazy shallow DOF.

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Lee Jay
(see profile for equipment)

So do i need to actually take a few shots in AI-Servo? or just follow the subject which AF is tracking and then it'll gather the correct information so when I do push the shutter all the way down, the part I want in focus, will be in focus?

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 Dylan Johnson's gear list:Dylan Johnson's gear list
Canon EOS 50D Canon EF 50mm f/1.8 II Canon EF 70-200mm f/2.8L IS USM Canon EF-S 18-55mm f/3.5-5.6 IS II Sigma 18-35mm F1.8 DC HSM
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