# Paul C. Buff Einstein E640 Flash Unit: specs and price

**Price (US):** $529.95 at s196259524.onlinehome.us (Current price via lens-camera.com, an authorized Paul C. Buff reseller; Paul C. Buff sells primarily direct-to-consumer with no significant third-party retail markup.), as of 2026-08-09. A sourced, dated price of record — other retailers (incl. Amazon) may be lower. Among the 8 studio strobes we track it is #3 cheapest of 8; category median $749.
**Brand:** Paul C. Buff
**Deskmark:** Platinum Deskmark — pay-blind category standing 98/100, #1 of 12 in class (independent, computed from sourced data, never for sale).

## Specifications

| Spec | Value |
| --- | --- |
| Price (US) | $529.95 |
| Brand | Paul C. Buff |
| Power output ws | 640 |
| 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 |
| Recycle time s | 0-1.7 |
| 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. |
| Modeling lamp (W) | — |
| Color temperature k | 5600 |
| Power source | AC only (100-240V, 3-wire grounded, auto-sensing with IEC connector); no battery option |

## Where it stands

At $530, the Paul C. Buff Einstein E640 Flash Unit is #3 cheapest of the 8 studio strobes we track, where the median is $749. On the spec sheet, its power output ws of 640 is the highest of the 12.

## Frequently asked questions

**How much does the Paul C. Buff Einstein E640 Flash Unit cost?**

The Paul C. Buff Einstein E640 Flash Unit has a US price of $529.95 (Current price via lens-camera.com, an authorized Paul C. Buff reseller; Paul C. Buff sells primarily direct-to-consumer with no significant third-party retail markup.), as of 2026-08-09.

**How does the Paul C. Buff Einstein E640 Flash Unit compare on price?**

At $530, the Paul C. Buff Einstein E640 Flash Unit is #3 cheapest of the 8 studio strobes we track, where the median is $749.

**What are the Paul C. Buff Einstein E640 Flash Unit's key specs?**

Paul C. Buff Einstein E640 Flash Unit (Paul C. Buff): power output ws 640, 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, recycle time s 0-1.7, 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., color temperature k 5600. Full sourced spec sheet verified 2026-08-09.

Source: http://s196259524.onlinehome.us/e640.php (s196259524.onlinehome.us, accessed 2026-08-09)
Corroboration: https://www.manualslib.com/manual/1037144/Paul-C-Buff-Einstein-E640.html (accessed 2026-08-09)
Canonical: https://frontdeskreview.com/product/studio-strobes/paul-c-buff-einstein-e640/
Cite: Per The Front Desk Review, the Paul C. Buff Einstein E640 Flash Unit price of record was $529.95 as of 2026-08-09 — https://frontdeskreview.com/product/studio-strobes/paul-c-buff-einstein-e640/
License: CC BY 4.0. Price history: https://frontdeskreview.com/data/price-history.jsonl