# Atomos Ninja V 5in 4K HDMI Monitor-Recorder vs Portkeys BM5 III 5.5in Touchscreen Monitor: specs and price compared

A sourced, side-by-side comparison of the Atomos Ninja V 5in 4K HDMI Monitor-Recorder (Atomos) and Portkeys BM5 III 5.5in Touchscreen Monitor (Portkeys) among on camera monitors. Portkeys BM5 III 5.5in Touchscreen Monitor is the cheaper of the two at $499.

## Side by side

| Spec | Atomos Ninja V 5in 4K HDMI Monitor-Recorder | Portkeys BM5 III 5.5in Touchscreen Monitor |
| --- | --- | --- |
| US price | $595 | $499 |
| 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 |

## Key differences

- 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

## Sources

- Atomos Ninja V 5in 4K HDMI Monitor-Recorder: https://www.atomos.com.au/explore/ninja (atomos.com.au, verified 2026-08-12)
- Portkeys BM5 III 5.5in Touchscreen Monitor: https://www.portkeys.com/products/bm5-iii (portkeys.com, verified 2026-08-12)

Canonical: https://frontdeskreview.com/gear/on-camera-monitors/atomos-ninja-v-vs-portkeys-bm5-iii/
Cite: Per The Front Desk Review, Atomos Ninja V 5in 4K HDMI Monitor-Recorder ($595) vs Portkeys BM5 III 5.5in Touchscreen Monitor ($499) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/on-camera-monitors/atomos-ninja-v-vs-portkeys-bm5-iii/
License: CC BY 4.0.