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Pixel Perfect wrote:
How does a 135mm shot on a 1.29x crop camera have the same FOV as a 200mm shot on a FF? This would give 1D X an advantage over and above it's extra 2MP in a non-FL scenario. Should have been ~153mm for 1D IV.
Just awesome bird photography Arash - you should label that series - Orkestral manoeuvres.
Thanks for catching this! good find.
I checked it again it was actually 145mm.I should have read the EXIF instead of marking on the lens. I corrected this.
now why is there still a small difference?
A: The FOV was exactly the same at 145mm. I used Live View to normalize FOV, the images on the LCD were identical. The small difference in FL is coming from focus breathing, i.e the FL of a zoom lens changes with focus distance. 200mm is measured at infinity focus, at close range it is a bit shorter, about 190mm.