- Price (almost twice as expensive as the 60s)
- Hooked closing mechanism is sometimes if not absolutely unlocked simultaneously
- Innendifussor with snaps would be better than the hook technique
- Outside diffuser with elastic would be better than the velcro used
General: The Aussleuchtung is good but with 70cm then already at the limit of flash units (Canon 430EXII or Yongnuo 560III). Larger diameter is no longer useful. Has brought more light compared to '65 Firefly one half stop.
