focusing Problem

[Sisteron]

I keep having this problem with my motorsport photos.I use a 1D Mk11 N and my main two lenses are the Canon 24-70 2.8 and the 70-200 2.8.

The Problem is that when I view the shots on my PC only part of the shot is in Focus.

e.g.

The only part in focus is inside the lines.

80% of the time I use TV mode and set the shutter speed with the 24-70 to 1/100 and with the 70-200 set the shutter speed to 1/160 or 1/200

What am I doing wrong?

 

[pxl8]

Looking at the exif this shot was 1/100s with flash so the shot is probably suffering from some subject movement which has blurred the areas of the car moving the fastest as it went around the corner. You need to increase the shutter speed if you want to freeze the subject even when using flash because that's only providing fill light in a situation like this.

 

[Canon Bob]

I would agree....

At a fairly slow 50km/hour then the car has moved about 1.4m in the 1/100 sec of your exposure. As it's moving away from you then panning isn't really an option to cope with this. I suggest up the ISO and shutter speed quite a bit if you want improved sharpness.

Bob

 

[CraigF]

I was going to suggest this also.
Ramp up the shutter and ISO. But strangely in the picture above the number plate appears to be in focus, also the right hand side of the car (bumper area) appears in focus.
Is the Lens clean?

 

[Canon Bob]

..... But strangely in the picture above the number plate appears to be in focus, also the right hand side of the car (bumper area) appears in focus.

Maybe not so strange if you think about it......

The rear of the car is travelling pretty much directly away from the camera so the only change would be the details reducing in size slightly. On the other hand, the front side of the car has started to traverse the view and hence appears more blurred.

Bob

 

[Sisteron]

Thanks Very much Lads,

What should I bring up the shutter speed to on each lens...

(A) 24-70

(B) 70-200

 

[pxl8]

You need to get the shutter speed high enough to freeze the motion of the car so it really depends on how fast (or far) the car is moving across the frame so the lens choice doesn't really make any difference. I would aim for 1/250s or better and see how it goes.

However, if you're panning then you need to stick to 1/125s or even 1/60s and then the sharpness comes from panning at the same speed as the car so the background, wheels, etc. are blurred but not the "static" details on the car.