# Paul C. Buff Einstein E640 Flash Unit vs Neewer Vision4 300W Battery-Powered Studio Strobe: specs and price compared

A sourced, side-by-side comparison of the Paul C. Buff Einstein E640 Flash Unit (Paul C. Buff) and Neewer Vision4 300W Battery-Powered Studio Strobe (Neewer) among studio strobes.

## Side by side

| Spec | Paul C. Buff Einstein E640 Flash Unit | Neewer Vision4 300W Battery-Powered Studio Strobe |
| --- | --- | --- |
| US price | $529.95 | not published |
| Brand | Paul C. Buff | Neewer |
| Power output ws | 640 | 300 |
| Flash duration t01 | 1/568 sec at full power (Constant Color mode, t0.5 1/1600 sec); as fast as ~1/2000 sec (t0.1) at half power in Action Mode | 1/1000 to 1/10000 sec |
| Recycle time s | 0-1.7 | 0.4-2.5 |
| Ttl hss support | Manual only — no TTL, no camera-side HSS. Fires via CyberSync radio triggers or optical slave; Action Mode shortens flash duration for motion-freezing rather than providing sync-pulse HSS. | Manual only — does not support TTL or HSS. Native sync speed capped at 1/200 sec; fires via Manual, Multi, or built-in 2.4G wireless remote modes. |
| Modeling lamp (W) | — | 13 |
| Color temperature k | 5600 | 5600 |
| Power source | AC only (100-240V, 3-wire grounded, auto-sensing with IEC connector); no battery option | Removable 10.8V/7800mAh lithium-ion battery (up to 1000 full-power flashes) |

## Key differences

- Power output ws: Paul C. Buff Einstein E640 Flash Unit 640 vs Neewer Vision4 300W Battery-Powered Studio Strobe 300
- Flash duration t01: Paul C. Buff Einstein E640 Flash Unit 1/568 sec at full power (Constant Color mode, t0.5 1/1600 sec); as fast as ~1/2000 sec (t0.1) at half power in Action Mode vs Neewer Vision4 300W Battery-Powered Studio Strobe 1/1000 to 1/10000 sec
- Recycle time s: Paul C. Buff Einstein E640 Flash Unit 0-1.7 vs Neewer Vision4 300W Battery-Powered Studio Strobe 0.4-2.5
- Ttl hss support: Paul C. Buff Einstein E640 Flash Unit Manual only — no TTL, no camera-side HSS. Fires via CyberSync radio triggers or optical slave; Action Mode shortens flash duration for motion-freezing rather than providing sync-pulse HSS. vs Neewer Vision4 300W Battery-Powered Studio Strobe Manual only — does not support TTL or HSS. Native sync speed capped at 1/200 sec; fires via Manual, Multi, or built-in 2.4G wireless remote modes.
- Power source: Paul C. Buff Einstein E640 Flash Unit AC only (100-240V, 3-wire grounded, auto-sensing with IEC connector); no battery option vs Neewer Vision4 300W Battery-Powered Studio Strobe Removable 10.8V/7800mAh lithium-ion battery (up to 1000 full-power flashes)

## Sources

- Paul C. Buff Einstein E640 Flash Unit: http://s196259524.onlinehome.us/e640.php (s196259524.onlinehome.us, verified 2026-08-09)
- Neewer Vision4 300W Battery-Powered Studio Strobe: https://www.neweggbusiness.com/product/product.aspx?item=9sivdykk9k0657 (neweggbusiness.com, verified 2026-08-09)

Canonical: https://frontdeskreview.com/gear/studio-strobes/paul-c-buff-einstein-e640-vs-neewer-vision4/
Cite: Per The Front Desk Review, Paul C. Buff Einstein E640 Flash Unit ($529.95) vs Neewer Vision4 300W Battery-Powered Studio Strobe (not published) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/studio-strobes/paul-c-buff-einstein-e640-vs-neewer-vision4/
License: CC BY 4.0.