Thank you, Grant. An excellent review IMO and one that tackles well the different framing options of when you are focal-length limited plus cropping and when you have the option of different lenses or changing position (you know, those real-world factors when shooting wildlife).
You talk there about the 1D4 being better for fast action and mention pixel density as a possible factor. Another explanation I have heard is that the 1D4 is better engineered to drive the power requirements of bigger lenses - any thoughts on this ?
I still opine occasionally whether I should have gone for a second hand 1D instead of the 7D but you have given me confidence I have made as good a judgement as I could have done.
Hi Mikehit, glad you found the comparison useful. I think that the 1D only drives AF faster when you are using the longest, biggest superteles, like the 400 f2.8, 500 f4, and 600 f4 as it has a 11V battery compared to the 7D Mk2 which is 6.something volts. But it could be a positive factor in favour of the 1D superior fast action hit rate. I have not actually tested them side by side through long focus pulls on a big lens. I know that the 5D Mk3, which uses the same battery as the 7dMk2, is a lot slower at driving big lenses through long pulls but I get around it by just making an effort to keep my focused distance close to where my subjects might be even when i cannot see the subject.
I do find it harder to get multiple sharp shots in sequences when I am using fine pixel pitch cameras though. I also try counter it by shooting really fast shutter speeds. But if I were forced to choose a camera just for shooting fast action, I would rather have one with larger pixels than smaller. Others might have different experience with this though as it is also influenced by the user. I am fortunate to be able to carry more than one camera in my wildlife bag, so i usually have it covered that way
One other thing I think about is Canon's 1D series which have always been built to excel at capturing high-speed sporting subjects, and their pixel pitch progression has never gone smaller than the 1D Mark 4. From the 1D Mk2 at 8.2 microns, 1DMk3 at 7.2 microns, 1Dmk4 at 5.7 microns, 1DX at 6.9 microns and 1DX Mk2 at 6.5 microns
Cheers
Grant