Nex-7 is bad bad bad . . .

Started Mar 10, 2012 | Discussions thread
Mark_McD Senior Member • Posts: 1,759
Re: Isn't this a problem of flange distance and pixel density?

Mike Fewster wrote:

The very short flange distance of the Nex plus the large sensor means that wa lenses have to bend light further at the edges. The microlenses help the lens to do this. But on the Nex 7, the higher pixel density adds another layer of difficulty.

MFT with a smaller sensor doesn't have to work as hard to bend the edges (but of course you need a wider angle lens to get the same FOV.

Part (only part) of the problems with the original Nex and 16mm lens reviews was that the microlenses weren't doing the lens justice. This was largely corrected in the 5n

Luminous Landscape had a good discusion on this when the Nex 7 was released, however they seemed quite happy with the Cornerfix solution. They also, as I remember, felt it was an issue of matching the lens design to the microlens and that therefore some non Sony wa lenses would have more problems than others.
Mike Fewster
Adelaide Australia

You're on the right track, the problem is that microlenses are adjusted for green photosites, which is why we see magenta (red + blue) casts with sharper angles of light.

edit: just to add to this, this is also the reason we see CA in the same colors on most cameras. The question isn't whether there's microlenses on a sensor, rather how complex the array is. The denser the sensor, we can assume (particularly accurate for Sony) that there's a more elaborate array. Whether it's a wavefront design (which I believe it is) like the m8/m9 is yet to be seen definitively.

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