Paul C. Buff
Paul C. Buff Einstein E640 Flash Unit
$529.95
Best Studio Strobes · head-to-head
Paul C. Buff Einstein E640 Flash Unit vs Neewer Vision4 300W Battery-Powered Studio Strobe
A sourced, side-by-side comparison. Paul C. Buff Einstein E640 Flash Unit is cheaper at $529.95. Every spec and price links to its source.
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Neewer
Neewer Vision4 300W Battery-Powered Studio Strobe
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Full spec sheet
✓ marks the stronger figure where "more" — or "less", for price and weight — is unambiguously better.
| Spec | Paul C. Buff Einstein E640 Flash Unit | Neewer Vision4 300W Battery-Powered Studio Strobe |
|---|---|---|
| US price | $529.95 | — |
| Brand | Paul C. Buff | Neewer |
| Released | — | — |
| 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) |
Sources — Paul C. Buff Einstein E640 Flash Unit: s196259524.onlinehome.us (verified 2026-08-09). Neewer Vision4 300W Battery-Powered Studio Strobe: neweggbusiness.com (verified 2026-08-09).
What's the difference between the Paul C. Buff Einstein E640 Flash Unit and Neewer Vision4 300W Battery-Powered Studio Strobe?
Where the two actually differ on the specs we track (5 of 7). Matching specs are omitted.
- 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)