| 15 cm Ring Kanone L/30 | |
|---|---|
 A 15 cm Ring Kanone L/30 captured by the British at Cambrai. | |
| Type | Naval gun Coastal artillery Siege gun |
| Place of origin |  German Empire |
| Service history | |
| In service | 1883-1918 |
| Used by | German Empire |
| Wars | World War I |
| Production history | |
| Designer | Krupp |
| Designed | 1883 |
| Manufacturer | Krupp |
| Produced | 1883 |
| No. built | 150 |
| Specifications | |
| Mass | 10 t (9.8 long tons; 11 short tons) |
| Barrel length | 4.47 m (14 ft 8 in) L/30[1] |
| Shell | Separate-loading, bagged charges and projectiles |
| Shell weight | 40 kg (88 lb) |
| Caliber | 149.1 mm (5.87 in) |
| Breech | Horizontal sliding-block |
| Recoil | None |
| Carriage | Box trail |
| Elevation | +35°[1] |
| Traverse | 10° |
| Muzzle velocity | 609 m/s (2,000 ft/s) |
| Maximum firing range | 12.1 km (7.5 mi)[1] |
The 15 cm Ring Kanone L/30 was a naval gun and coastal artillery piece that was used by the German Navy before the First World War. It was converted to a siege gun for the German Army during the First World War, when the ships that carried it were decommissioned.