Camera is equipped with EXR Processor II processor and can take pictures up to 4896 x 3264 resolution. It can also take pictures with lower resolutions like S: (3:2) 2496 x 1664 / (16:9) 2496 x 1408 / (1:1) 1664 x 1664 with 1:1, 3:2, 16:9 aspect ratios.
Lens Mount
Fujifilm X-M1 has Fujifilm X lens mount. Due to APS-C sensor its crop factor (also called lens multiplier) is 1.5x. This means that a 35mm equivalent focal length of the mounted lens will be equal to its actual focal length times 1.5.
No Low-Pass Filter
There is no optical low-pass filter (OLPF), also known as an anti-aliasing filter, in front of the sensor. This results in a slightly sharper image but may also introduce moiré patterns and aliasing artifacts when photographing subjects with fine, repetitive patterns or details.
No In-Body Image Stabilization
The camera does not have in-body image stabilization (IBIS) so it needs lenses with optical image stabilization for vibration reduction.