max auto focus points or frames per second

[egor110]

I want to get a slr for filming bike/car racing.
Do i go for a camera with more autofocus points or higher frame per second?

canon 550d 9 point a/f 3.4 fps
nikon 5100 11 4
nikon 3100 11 3
pentax k-r 12.4 6
on paper the pentax has more a/f points and more fps.

[Simpo Two]

I'd have thought fast accurate autofocus tracking has to be a prime consideration. Otherwise you might get photos all focused behind/in front of the subject.

The camera will probably have various focusing modes that link all the AF points together for such purposes, and the chances are the subject will be fairly near the middle - and peripheral AF points tend to be less accurate, so number of AF points wouldn't worry me either. Nor FPS particularly - I'd rather have one perfect shot per lap than 10 not quite right (and 10x as many shots to wade through!)

I don't think 'accuracy of AF tracking' is a feature in spec lists, but generally the more expensive the body/lens combo, the more likely it is to be better.


Not much help was I?!

[egor110]

I had a feeling it wouldn't of been as simple as highest number wins.
I'm looking to spend £600 and quite happy for people to recomnend second hand stuff.

[RobDickinson]

How about a used canon 50d?

Remember a decent lens will cost a bit too.

[nellyleelephant]

secondhand?

1D2 - 45 focus points and 8.5fps.

http://www.mpbphotographic.co.uk/used-equipment/us...

[Gemm]

As already mentioned, it's not the number that matters; it's the speed & accuracy. My camera has 40-something but I use a centre single point or pre-selected single point most of the time, so the number isn't really important for me.

[RobDickinson]

More is generally better for finding one in the area of the frame you want the subject to be.

Focus and recompose is a godo way to fail, better to shoot wider and crop.

Remember some will be f2.8 type or cross focus points etc , these are worth 10 of the non cross type f5.6 points...