OMD E-M1 vs Sony A-7, What's the Difference?

Started Oct 23, 2013 | Discussions thread
Ulric Veteran Member • Posts: 4,558
Re: Lenses look about the same to me...

blue_skies wrote:

Ulric wrote:

blue_skies wrote:

The A7r has 36Mp as well as CIZ. 36Mp allows for a 2x zoom, and CIZ would double this again.

CIZ is digital zoom, right? So the original 36 MP resolution becomes ~2 MP.

No, CIZ is a 'pattern enhancer'. It extrapolates the image information by using heuristics, and it can work surprisingly well. Some times it fails, but often it does work almost as good as high-end up-samplling software programs do - those do not extrapolate, but 'add' new data.

Using CIZ does not lower the resolution, but it can lower the IQ.

That sounds exactly like a description of digital zoom, for example the "digital teleconverter" in Olympus cameras.

 Ulric's gear list:Ulric's gear list
Panasonic Lumix DMC-GF3 Olympus OM-D E-M5 Panasonic Lumix DMC-GM1 Olympus PEN-F Panasonic Lumix G 20mm F1.7 ASPH +13 more
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