Sunday 4 November 2012

Olympus OM-D E-M5 vs X-Trans sensor

I was in a pixel peeping mood yesterday. Unfortunately, Fuji X-E1 reviews are not available yet on sites such as dpreview. I played with test photos from X-Pro1 and Olympus OM-D posted on imaging resource, because it is assumed that the image quality is identical between Fuji X-E1 and X-Pro1 cameras. .

WARNING: big files
I've looked on iso 200 photo at low noise setting in Fuji X-Pro1
and iso 200 photos from Olympus OM-D E-M5 either with noise filter switched to low or turned off.

From what I can see, Olympus OM-D E-M5 outresolves X-Trans sensor in  Fuji X-Pro1. Scales is the most obvious place to look at. The light brown cloth next to yellow is smooth in the X-P1 photo but in the Olympus image the structure is clearly visible. The same situation is for the black fabric under the mug, at the very bottom. In term of resolution Olympus made a miracle with its OM-D E-M5 camera. However, the photo from X-Pro1 has very clean shadows that can be lifted without obtrusive color noise. Image from Fuji X-Pro1 can be nicely sharpen while applying the same sharpening or unsharpen mask filter to the OM-D images does not look very attractive. The original Olympus images already have some sharpening halos. Sharpening of the X-Pro1 image brings up some details in fabrics.

Even at iso 800 Olympus OM-D E-M5 resolve more details on the scales than Fuji X-Pro1.
WARNING: big files
OM-D E-M5 image at iso 800
X-Pro1 image at iso 800

Interestingly, the  JPEGs are twice bigger in Olympus OM-D E-M5 than in Fuji X-Pro1.

So, 16MP X-Tras sensor does not have anti-aliasing filter but apparently it cannot match 16MP m4/3 sensor in Olympus OM-D E-M5, at least in some areas of the test scene. On tricky regular patters such as the scales in the test scene Fuji X-Pro1 is somewhat similar to Fuji X100 in term of resolution. The X-Pro1 has more artifacts but does resolve slightly more details on the scales.

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