Atomos
Atomos Ninja V 5in 4K HDMI Monitor-Recorder
$595
Released 2018-09-01
Best On Camera Monitors · head-to-head
Atomos Ninja V 5in 4K HDMI Monitor-Recorder vs Portkeys BM5 III 5.5in Touchscreen Monitor
A sourced, side-by-side comparison. Portkeys BM5 III 5.5in Touchscreen Monitor is cheaper at $499. Every spec and price links to its source.
Portkeys
Portkeys BM5 III 5.5in Touchscreen Monitor
$499Cheaper
Which is better: the Atomos Ninja V 5in 4K HDMI Monitor-Recorder or Portkeys BM5 III 5.5in Touchscreen Monitor?
They split the 2 specs we compare evenly. The Portkeys BM5 III 5.5in Touchscreen Monitor is the cheaper at $499.
See Atomos Ninja V 5in 4K HDMI Monitor-Recorder on Amazon See Portkeys BM5 III 5.5in Touchscreen Monitor on Amazon
As an Amazon Associate we earn from qualifying purchases. Prices verified at capture; live price may differ.
Key specs, head to head
The numbers that decide it, drawn to scale — longer bar wins, the accent bar is the stronger figure.
Full spec sheet
✓ marks the stronger figure where "more" — or "less", for price and weight — is unambiguously better.
| Spec | Atomos Ninja V 5in 4K HDMI Monitor-Recorder | Portkeys BM5 III 5.5in Touchscreen Monitor |
|---|---|---|
| US price | $595 | $499 Current price on portkeys.com |
| Brand | Atomos | Portkeys |
| Released | 2018-09-01 | — |
| Screen size (in) | 5.2 | 5.5 |
| Resolution | 1920x1080 | 1920x1080 |
| Brightness (nits) | 1000 | 2200 |
| HDMI sdi io | 1x HDMI 2.0 in, 1x HDMI 2.0 out; no SDI | 1x 3G-SDI in, 1x HDMI in, 1x 3G-SDI out (cross-conversion) |
| HDR lut support | HDR (HLG/PQ) monitoring, 3D LUT import | 3D LUT monitoring/output; custom LUT load via USB-A |
| Touchscreen | Yes | Yes |
| Battery mount | Sony NP-F style via optional battery bracket (not included stock) | Built-in Sony NP-F style battery plate |
| Weight (g) | 340 | 351 |
Sources — Atomos Ninja V 5in 4K HDMI Monitor-Recorder: atomos.com.au (verified 2026-08-12). Portkeys BM5 III 5.5in Touchscreen Monitor: portkeys.com (verified 2026-08-12).
What's the difference between the Atomos Ninja V 5in 4K HDMI Monitor-Recorder and Portkeys BM5 III 5.5in Touchscreen Monitor?
Where the two actually differ on the specs we track (6 of 8). Matching specs are omitted.
- Screen size (in): Atomos Ninja V 5in 4K HDMI Monitor-Recorder 5.2 vs Portkeys BM5 III 5.5in Touchscreen Monitor 5.5
- Brightness (nits): Atomos Ninja V 5in 4K HDMI Monitor-Recorder 1000 vs Portkeys BM5 III 5.5in Touchscreen Monitor 2200
- HDMI sdi io: Atomos Ninja V 5in 4K HDMI Monitor-Recorder 1x HDMI 2.0 in, 1x HDMI 2.0 out; no SDI vs Portkeys BM5 III 5.5in Touchscreen Monitor 1x 3G-SDI in, 1x HDMI in, 1x 3G-SDI out (cross-conversion)
- HDR lut support: Atomos Ninja V 5in 4K HDMI Monitor-Recorder HDR (HLG/PQ) monitoring, 3D LUT import vs Portkeys BM5 III 5.5in Touchscreen Monitor 3D LUT monitoring/output; custom LUT load via USB-A
- Battery mount: Atomos Ninja V 5in 4K HDMI Monitor-Recorder Sony NP-F style via optional battery bracket (not included stock) vs Portkeys BM5 III 5.5in Touchscreen Monitor Built-in Sony NP-F style battery plate
- Weight (g): Atomos Ninja V 5in 4K HDMI Monitor-Recorder 340 vs Portkeys BM5 III 5.5in Touchscreen Monitor 351