Metz 34-CS2   Powerful Small Manual/Auto flash for your M2-M3-M4-M5-M6!  Same profile as the Leica SF-20. Guide # 92 at ISO 100 - 111 with Tele Adapter Operation Manual or Auto Zoom N/A Bounce N/A Recycle Time .3-6 Seconds Number of Flashes 100 Wide Angle Diffuser Yes, Supplied with Flash SCA TTL System No Sync Hotshoe or Sync Cord Weight 5.6 oz.