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 Interfit Honey Badger 320Ws Compact Flash Head
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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Interfit
Interfit Honey Badger 320Ws Compact Flash Head
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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 | Interfit Honey Badger 320Ws Compact Flash Head |
|---|---|---|
| US price | $529.95 | — |
| Brand | Paul C. Buff | Interfit |
| Released | — | — |
| Power output ws | 640 | 320 |
| 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 | 1/900 sec at full power |
| Recycle time s | 0-1.7 | 1 |
| 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 — no TTL, no HSS documented in the manufacturer manual (fires via built-in optical slave or 2.4G radio trigger accessories) |
| Modeling lamp (W) | — | 60 |
| Color temperature k | 5600 | 5600 |
| Power source | AC only (100-240V, 3-wire grounded, auto-sensing with IEC connector); no battery option | AC power port (no battery option); optional external battery packs sold separately by Interfit |
Sources — Paul C. Buff Einstein E640 Flash Unit: s196259524.onlinehome.us (verified 2026-08-09). Interfit Honey Badger 320Ws Compact Flash Head: interfitphoto.com (verified 2026-08-09).
What's the difference between the Paul C. Buff Einstein E640 Flash Unit and Interfit Honey Badger 320Ws Compact Flash Head?
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 Interfit Honey Badger 320Ws Compact Flash Head 320
- 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 Interfit Honey Badger 320Ws Compact Flash Head 1/900 sec at full power
- Recycle time s: Paul C. Buff Einstein E640 Flash Unit 0-1.7 vs Interfit Honey Badger 320Ws Compact Flash Head 1
- 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 Interfit Honey Badger 320Ws Compact Flash Head Manual only — no TTL, no HSS documented in the manufacturer manual (fires via built-in optical slave or 2.4G radio trigger accessories)
- 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 Interfit Honey Badger 320Ws Compact Flash Head AC power port (no battery option); optional external battery packs sold separately by Interfit