Autofocus speed comparison of mirrorless?

Started Apr 26, 2014 | Discussions thread
D Cox Forum Pro • Posts: 19,510
Re: Autofocus speed comparison of mirrorless?

Lumixdude wrote:

The Nikon 1 really is a toy camera aimed at point and shoot photographers. It's been picked up by certain DSLR users for the fact that it has a 2x crop factor meaning that any lens you attach to it will double in focal length, a 300mm will become a 600mm.

If you want APS-C like image quality you will have to upgrade at least to a Micro Four Thirds camera.

I think if you want APS-C image quality, you buy a camera with an APS-C sensor. A smaller sensor may be nearly as good.

Micro Four Thirds cameras have fast focus speed, faster than most mirrorless cameras in general e.g. Fuji, Canon, etc...

There is a few caveats, due to the contrast detect auto focus if you're not shooting contrasty objects i.e. if you're trying to focus at infinity with the sky in a landscape photography it can sometimes get into a situation where the camera wont find focus.

The other one is that Micro Four Thirds isn't particularly good at shooting fast moving objects, birds, wildlife, sport, etc... The OMD E-M1 and E-M10 have made some inroads into that but for action photography you're still going to want a traditional DSLR.

Outside of that, it will be fine Micro Four Thirds produces APS-C image quality in all aspects except for high ISO.

Which is needed for indoor shots of family.

Micro Four Thirds don't yet have a great ISO range. ISO100 to ISO1600 are all useable, beyond that you run into issues. As a comparison you might triple that and be shooting comfortably with ISO6400 in a pinch on an APS-C DSLR.

The Question then becomes, how much are you going to invest into faster lenses for low light photography. If you're interested in shooting low light with a Micro Four Thirds camera you really need to be shooting with an F/2.8 or faster lens.

By the time you buy a fast lens for Micro Four Thirds cameras such as the Olympus 12-40 F/2.8, Panasonic 12-35 F/2.8, Panasonic 35-100 Zooms, or any of the fast primes such as the 12/2, 15/1.7, 17/1.8, 20mm F/1.8 or 45 F/1.8 your back up to the same price point as an APS-C DSLR.

If money and performance is an issue you have to spend a lot to gain equivalence with Micro Four Thirds but all of the above lenses are very good and designed specifically for the Micro Four Thirds image circle.

Maybe next year there will be a fast-focussing Full Frame mirrorless camera.

I think that within 3 or 4 years, all serious cameras will be focussing as fast as the Nikon J1. It is partly a matter of the speed of the processing chips in the cameras.

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