Canon's mid-range EOS M mirrorless with a built-in EVF and tilting screen.
The Canon EOS M3 was released in February 2015 as Canon's fourth EF-M mirrorless camera, bringing a substantially redesigned control layout compared to the M and M2. The M3 added a proper mode dial and an exposure compensation dial, addressing the operational depth complaints of the earlier models. Hybrid CMOS AF III provided improved phase-detect tracking speed over the contrast-only approach of the M and M2. No electronic viewfinder is built in; the optional EVF-DC1 or EVF-DC2 attaches via the hot shoe. The M3 was positioned for enthusiasts stepping up from smartphones or compact cameras.
The 24.2MP APS-C CMOS sensor pairs with the DIGIC 6 processor. The 49-point Hybrid CMOS AF III combines phase and contrast detection for improved tracking over contrast-only predecessors. Burst shooting runs at 4.2fps — functional for general photography and moderate action. Video records at 1080p up to 30fps; there is no 4K recording. The tilting touchscreen is 3.0 inches at 1,040k dots, tilting downward for low-angle use and upward toward the photographer for self-facing shots. There is no weather sealing and no built-in EVF. Battery life approximately 250 shots using the LP-E17, body only approximately 366g, single SD/SDHC/SDXC slot.
The M3's practical improvement over the M2 is the control layout: the mode dial and dedicated exposure compensation dial make manual and semi-manual shooting practical in ways the earlier models did not support. Hybrid CMOS AF III covers static and slow-moving subjects reliably; fast-action tracking remains limited compared to phase-only or later Dual Pixel CMOS AF systems. In good light the 24.2MP sensor produces capable APS-C image quality through ISO 1600-3200. The EF-M lens selection is limited; EF and EF-S lenses are fully functional via the EF-M to EF-S/EF mount adapter.
On the used market the M3 is very affordable. Canon ceased development of EF-M lenses and transitioned new camera investment to the RF system — the EF-M ecosystem dead-end is the systemic constraint for any used M-mount purchase. Condition checks: tilting screen hinge, LP-E17 battery health, and the hot shoe contacts for the optional EVF accessory. The Canon EOS M6 Mark II (2019) provides a substantially better sensor and faster burst within the EF-M system at higher used prices. Compatible with all Canon EF-M native lenses; EF and EF-S lenses via adapter.