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Ivor
6th December 2016, 04:09 PM
Reading this review (https://www.dpreview.com/reviews/olympus-om-d-e-m1-mark-ii/11) it says:

"But the fact remains, the sensor in the E-M1 II is only a quarter of the size of a full-frame, 35mm-sized sensor"

Is that right? I though the m4/3 sensor was half the size of 35mm.

Ivor

Ian
6th December 2016, 04:22 PM
They are correct. The area of the sensor is approximately a quarter. The cropping factor relates to the image circle diameter, which is half that of 'full frame'. APS-C is 1/2.3 the area of FF.

Ian

Otto
6th December 2016, 04:25 PM
It's approximately half the width and height so about a quarter of the area:
https://en.wikipedia.org/wiki/Digital_single-lens_reflex_camera#Sensor_size

Ivor
6th December 2016, 04:32 PM
My bad! (as my teenage son says) Thanks.

They rarely mention the size of 35mm against that of medium format sensor, or how much bigger 4/3s is compared with compacts!

Reviews also regularly ignore the many benefits of having a smaller sensor size, often only concentrating on the negatives.

Graham_of_Rainham
6th December 2016, 06:50 PM
When the results from a camera with small sensor are every bit as good as those from one costing very much more, the bigger sensor is all that is left to cling on to, to justify that extra cost, size & weight... :rolleyes: