11-07-2017, 12:53 AM
I reckon it is caused by the camera not being able to determine exactly what to use for AF exactly, as the AF points cover quite a bit more territory than they do with e.g. tele-lenses. Having a slower aperture helps a lot in those cases, I would think.
What may help is focusing on large contrast transitions, if any items can be found at the same distance as the subject one wants to focus on. This is something that not only works fairly well with extreme UWAs, but also when experiences very low light levels, IME anyway.
Kind regards, Wim
What may help is focusing on large contrast transitions, if any items can be found at the same distance as the subject one wants to focus on. This is something that not only works fairly well with extreme UWAs, but also when experiences very low light levels, IME anyway.
Kind regards, Wim
Gear: Canon EOS R with 3 primes and 2 zooms, 4 EF-R adapters, Canon EOS 5 (analog), 9 Canon EF primes, a lone Canon EF zoom, 2 extenders, 2 converters, tubes; Olympus OM-D 1 Mk II & Pen F with 12 primes, 6 zooms, and 3 Metabones EF-MFT adapters ....