What does it mean that Canon professional cameras are high-precision and optimized for fast lenses?
Canon s high-end EOS cameras (1, 1N, 3, 1V, 1D, 1Ds, 1D mark II, 1Ds mark II, 5D) contain high-precision cross sensors. These are autofocus sensors which focus three times more accurately than the standard sensors found in other camera models. The drawback is that they require very fast lenses to work. If you put a slower lens onto one of these cameras then the cross sensors revert to linear sensors which detect lines in one direction only. The upshot is that putting a slow lens on one of these cameras is a bad idea as you re not taking full advantage of its capabilities. Is this a big deal? Should you be worried that your non-high-end EOS camera has only standard precision autofocus sensors? Well, if you re shooting under conditions of very narrow depth of field all the time – extreme macro photography or really long telephoto lenses – then using a pro camera can help you autofocus more accurately. But if you re doing normal photography then you probably won t notice a difference.
Canon s high-end EOS cameras (those with 1 digital model numbers) contain high-precision cross sensors. These are autofocus sensors which focus three times more accurately than the standard sensors found in other camera models. The drawback is that they require very fast lenses to work. If you put a slower lens onto one of these cameras then the cross sensors revert to linear sensors which detect lines in one direction only. The upshot is that putting a slow lens on one of these cameras is a bad idea as you re not taking full advantage of its capabilities. Is this a big deal? Should you be worried that your non-high-end EOS camera has only standard precision autofocus sensors? Well, if you re shooting under conditions of very narrow depth of field all the time – extreme macro photography or really long telephoto lenses – then using a pro camera can help you autofocus more accurately. But if you re doing normal photography then you probably won t notice a difference.
