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Message: <blockquote data-quote="tdodd" data-source="post: 1193744" data-attributes="member: 55450">FWIW I've just uploaded an album of BIF shots taken with my 40D at Colchester zoo recently. Every shot here was taken using all focus points and I have included resized full frame images and 100% crops. They're not that great, because the birds were pretty lively and tracking them was a real problem. Many shots are way off centre and in most shots the background is actually pretty busy. Even when focus is off, it is only because the AF has failed to keep up, or because my tracking was simply too poor. I do not see signs anywhere that the AF got confused and switched to the background. Here's the album, displayed as a slideshow. There are 40 images and 40 crops, representing the results from 2 X 20 minute flying demonstrations.... <a href="http://picasaweb.google.co.uk/EezyTiger/BIF40DAndAllAFPointsInUse/photo?authkey=tQzX3FlZxJA#s5198069123532806018" target="_blank">http://picasaweb.google.co.uk/EezyTiger/BIF40DAndAllAFPointsInUse/photo?authkey=tQzX3FlZxJA#s5198069123532806018</a> In many respects I wish I'd zoomed in closer but some of the shots were with my 70-200 and I was already at full stretch with that and struggling to keep the birds in the frame at all, much less centred. The problem with the zoo display is that the birds get such short runs it is hard to get a bead on them and then keep up.</blockquote>