OM System OM-3 Astro has a
20.0MP Four Thirds (17.4 x 13 mm ) sized Stacked BSI Live MOS Sensor sensor and features TruePic X Dual Quad Core processor. On the other hand, Fujifilm GFX 100 II has a
102.0MP Medium format (44 x 33 mm ) sized BSI-CMOS sensor and features X-Processor 5 processor.
Fujifilm GFX 100 II's sensor provides 82MP more than OM System OM-3 Astro's sensor, which gives a significant advantage in real life. You can print your images larger or crop more freely.
On the other hand, please keep in mind that Max sensor resolution is not the only determinant of resolving power. Factors such as the optical elements, low pass filter, pixel size and sensor technology also affects the final resolution of the captured image.
Another difference between these two cameras is that OM System OM-3 Astro's sensor lacks anti-alias (Low-Pass) filter. Removing anti-alias filter increases the sharpness and level of detail but at the same time, it increases the chance of moiré occurring in certain scenes.
Below you can see the OM-3 Astro and GFX 100 II sensor size comparison.
Sensor Size and Resolution Comparison image of OM System OM-3 Astro and Fujifilm GFX 100 II Cameras
As seen above, Fujifilm GFX 100 II has a 6.4x Larger sensor area than OM System OM-3 Astro. Larger sensors give photographer more control on the depth of field and blurry background compared to smaller sensor when shot in same focal length and aperture.
Sensor size sets the circle of confusion, so it drives how much depth of field each
of these bodies gives you at a given aperture. You can calculate it exactly for the
OM System OM-3 Astro
or the
Fujifilm GFX 100 II ,
including hyperfocal distance.
One thing to watch when comparing these two: they have different sensor sizes
(Four Thirds versus Medium format),
so compare them at the same framing rather than the same focal length.
Put the same focal length on the smaller sensor and it will show less depth of
field, not more, because it also crops tighter. The calculator shows the
full frame equivalent focal length for each body so you can match the framing.
