EOS M3vs A7 IV
GearScore™ Verdict — Which should you buy?
Casual & Everyday — EOS M3 (2015): The EOS M3 was a meaningful upgrade over the original EOS M — bringing 24MP, a tilting touchscreen, and improved Hybrid CMOS AF III. Video tops out at 1080p/30p and burst shooting is modest, but for stills photographers wanting affordable APS-C quality, the M3 is a competent used-market option.
Portrait & Wedding Photography — A7 IV (2021): The full-frame portrait benchmark — 33MP, AI Eye AF, and exceptional skin-tone rendering in a pro-grade hybrid body.
Who should buy what
EOS M3 (2015)
- Photographers who want affordable 24MP APS-C quality on a budget
- Casual shooters who want a compact EF-M camera with a tilting screen
- Users looking for an affordable entry into the Canon EF-M ecosystem
- Used-market buyers wanting a capable but inexpensive mirrorless
A7 IV (2021)
- Working photographers who want a reliable full-frame all-rounder
- Portrait, wedding, and event photographers needing 33MP and fast AF
- A7 III owners ready for a major upgrade in resolution, AF, and video
- Hybrid shooters who want 4K/60p and 33MP stills in one dependable body
Quick take: The a7 iv has the highest resolution at 33mp; the eos m3 is the most affordable; only the a7 iv is weather sealed. Scroll down for the full spec breakdown.
Full specifications
| Specification | EOS M3 (2015) | A7 IV (2021) |
|---|---|---|
| Price | £150 | £2,299 |
| Sensor | 24.2MP APS-C CMOS | 33MP Full-frame BSI Exmor R CMOS |
| Resolution | 24.2MP | 33.0MP |
| Video | 1080p/30p | 4K/60p oversampled, 10-bit internal, S-Log3, S-Cinetone |
| Autofocus | Hybrid CMOS AF III (phase-detect + contrast-detect) | 759-point phase-detect, AI subject recognition |
| Stabilisation | — | 5-axis IBIS, 5.5 stops |
| Burst Rate | 4.2fps | 10fps mechanical, 30fps electronic |
| Battery Life | ~250 shots (CIPA) | ~580 shots (CIPA) |
| Weight | 366g (body only) | 659g body only |
| Dimensions | 110.9 × 68.0 × 44.4mm | 131.3 × 96.4 × 79.8mm |
| Weather Sealed | No | Yes |
| Viewfinder | None (optional EVF-DC1 accessory) | EVF, 3.69M dots, 0.78× magnification |
| Screen | 3.0" tilting touchscreen, 1.04M dots | 3.0" vari-angle touchscreen |
| Mount | Canon EF-M mount | Sony FE (full-frame E-mount) |
| Memory Cards | Single SD UHS-I slot | Dual slots: CFexpress Type A + SD UHS-II |
| Connectivity | USB, Wi-Fi, NFC | USB-C (3.2 Gen 2), Bluetooth, Wi-Fi |
Suitability by genre
| Genre | EOS M3 | A7 IV |
|---|---|---|
| Casual | — | |
| Travel | — | |
| Portrait | — | |
| Street | — | |
| Vlogging & Video | ||
| Sports & Action | ||
| Studio Portraits | — | |
| Outdoor Portraits | — | |
| Wedding & Events | — | |
| Landscape | — |
GearScore™ suitability scores are based on aggregated purchaser reviews weighted by photography genre. See how scores are calculated →
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Camera family history