Quote Originally Posted by neuroanatomist


But just to be contrary [img]/emoticons/emotion-13.gif[/img] ffron might be deriving some crop factor benefit on angle of view - the lenses mentioned as being used for gymnastics are both telephoto, so the 1.6x crop sensor might mean not having to deeply crop the resulting images(after 'losing' a an effective 60% boost in focal length). If you have to crop a 5DII image by 1.6x, you end up with an image of lower quality and less than half the pixels of one from the 7D. The alternative (buy a longer lens) is a costly one for fast apertures at those focal lengths...

The OP has a 70-200mm f2.8, which may very well be enough length to fill the full frame 5D. It would be easy to see if ffron is mainly shooting on the short end of the zoom, the mid to long end of the 200mm will take up the gap. If usualy at the long end then a new lens might be in order.


But...ffron said they wanted to capture tumbling. Keep in mind the frame rates, the 5D II with <4 compared to the 7D's8 per second. You have twice the chance of capturing the action with the 7D.


Another thing maybe to consider is the burst rate. The 5D for a full Raw image is 13, before you will hit the nasty "Busy" signal. The burst rate of the 7D is 15.


It sounds to me like the 7D would be the best fit for what ffron has described.