MFT I don't get it . . .

Started Jan 29, 2014 | Discussions thread
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a13 Regular Member • Posts: 177
Re: The MFT standard explicitly allows a variety of aspect ratios

Tom Axford wrote:

letsgofishing wrote:

Tom Axford wrote:

The four thirds in MFT refers to the sensor size, which is four thirds inches (i.e. 1.33 inches) using a very old way of specifying the size of sensors in television cameras by giving the size of the tube in which the sensor was located. The actual sensor diameter is about 0.8" in MFT cameras.

...maybe - it is laso the actual physical aspect ratio of the sensor - 17.3x13mm = 4:3.....

It is purely coincidence that the common aspect ratio is currently 4:3.

The point I was making is that the Micro Four Thirds standard is designed to be compatible with various different aspect ratios. At the moment all MFT cameras use 4:3 (although a few have multi-aspect ratio sensors allowing 16:9 also), but at any time a manufacturer could produce an MFT camera using 1:1 or 3:2, etc, if they felt it would be economically viable.

The MFT mount standard is designed to be compatible with all lenses meeting the format, and of course any manufacturer -could- put any sized sensor they like behind the mount. But since anything else (apart from 1:1) would still be a crop from 4:3, why would a manufacturer go about designing a whole new funky-shaped sensor when you would be writing a smaller image area from the lens and suffer distorting all the common lens reaches to boot?

There's nothing in the MFT standard that makes is more or less compatible with alternative sensor ratios than any other system and -its- non-standard ratios, and the 4/3 most certainly -IS- derived -directly- from the 4:3 ratio of the (standard) sensor.

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