06-14-2016, 10:25 PM
The GH4 is used by professionals to shoot video, up to and including 4K, so I guess it must be significantly good for video. Also, Panasonic has brought out a bunch of lenses with (near) silent AF motors, and some good fast glass in this category as well.
As to AF, as long as micro 4/3 will continu using only CAF, there are limits to low light focusing - AF speed has increased significantly over the past years in micro 4/3 land, however, even if not to the levels we are used to with dslr PDAF.
Regarding AF tracking in sports and/or wildlife (bird) photograpy, there is no system that can beat dslrs yet, both for speed, and for low light sensitivity of the AF systems. So, although the Panasonic Leica 100-400 is used by wildlife and bird photographers, you still need to know what you are doing, and how to focus manually as well. The lens is very good indeed. Do note that cropping with a 16 or 20 MP sensor is more awkward/difficult than with, e.g., a larger sized 40+ MP sensor, however. The Pan/Leica 100-400 makes up some for this by going to a FF equivalent of 800 mm, but it still won't focus like a 100-400 mm on a FF dslr body.
HTH, kind regards, Wim
As to AF, as long as micro 4/3 will continu using only CAF, there are limits to low light focusing - AF speed has increased significantly over the past years in micro 4/3 land, however, even if not to the levels we are used to with dslr PDAF.
Regarding AF tracking in sports and/or wildlife (bird) photograpy, there is no system that can beat dslrs yet, both for speed, and for low light sensitivity of the AF systems. So, although the Panasonic Leica 100-400 is used by wildlife and bird photographers, you still need to know what you are doing, and how to focus manually as well. The lens is very good indeed. Do note that cropping with a 16 or 20 MP sensor is more awkward/difficult than with, e.g., a larger sized 40+ MP sensor, however. The Pan/Leica 100-400 makes up some for this by going to a FF equivalent of 800 mm, but it still won't focus like a 100-400 mm on a FF dslr body.
HTH, 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 ....
