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p.1 #2 · p.1 #2 · Sony A9 and Nikon D5 Hi ISO-practical comparison. | |
SoundHound wrote:
I shoot low light stage dance action in mixed/changing lighting. Of necessity I must use ME.
Up until now the D5 has had the Hi ISO edge on FF bodies. However, the A9 has several advantages:
1. Tighter framing (with two, native, zooms) with Sony's full frame AF sensor coverage.
2. Faster, more accurate ME. Changing exposures are seen in the EVF-no need to test shoot then LCD Chimp.
3. Quicker ISO changes.With the "wheel" set for ISO there's faster selection and more accurate ISOs.
4. 3.4 more mP (24.2 vs the D5's 20.8) for more pixel density and "cropablity."
5. Faster, Sony T2.8 zoom lenses, My 24-70 & 70-200 GMs are approx 1/4 T stop faster than various zoom Nikkors.
I typically shoot at 6400 and 12,800 ISO. So far, I find no practical A9 Hi ISO deficit, through my RAW workflow, compared to the Nikon D5. With more experience I would expect the A9 to surpass the D5 in, effective, Hi ISO image quality.
Of course the A9 bonuses of a silent, 20 fps shutter are game changing-for me.
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What I am always suspicious about is, if a lens, e.g. the 24-70/2.8GM, has a T-stop equalling the F-stop. We don't know whether the manufacturer applies some gain internally to overcome brightness differences, as measured by DXO (including the sensor).
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