Why I prefer Olympus 4/3 to Sony full frame for Birds in Flight
The conventional argument against Olympus for birds in flight is sensor noise — but the 1.3-stop sensor disadvantage is cancelled by the 1.3–2-stop lens speed advantage of the OM pro telephoto lenses over the Sony 200-600mm at equivalent focal lengths. Focus accuracy testing confirmed this: in challenging afternoon sessions requiring instant acquisition on erratically moving birds, the EM1x matched or outperformed every Sony system tested, and the OM system’s substantially lower inertia made the difference in shots requiring rapid tracking.
