Originally posted by IchabodCrane
I've never seen any independent camera test for low light AF capability.
'Capability', 'functionality' - these are vague terms. I just want to get the [EV] numbers.
I haven't done any Googling on formal low-light AF testing. I've seen a variety of AF tests out there done by various magazines and sites, but I haven't looked into the EV ranges they work with, nor whether they pretend to adopt some CIPA or ISO standard test. Even testing of exposure metering in low-light is rare.
Of the review sites, only Imaging Resource, to their credit, seems to bother systematically testing exposure and AF under low light (down to 1/16 footcandle/0.67 lux), but they don't attempt to numerically measure anything. The best you will get will be 'by-eye' assessments like:
"Color balance with Auto white balance is fairly neutral at higher light levels, just a touch cool, but took on an increasingly stronger magenta cast as light levels dropped and ISO increased, as we've seen with other Nikons. ... The camera's phase-detection autofocus system was able to focus on our test subject down to well below the 1/16 foot-candle light level unassisted with an f/2.8 lens, which is excellent." (for the
Nikon D4s)