VX20 Dobsonian
The VX Dobsonian Range
VX20 Dobsonian
From: £5,826.60 excl. VAT
VX20 is a semi truss design and is shown here on a Dobsonian Mount
SPECIFICATIONS
| Specification | VX6 | VX6L | VX8 | VX8L | VX10 | VX10L | VX12 | VX12L | VX14 | VX16 | VX20 |
| Primary mirrordia. mm | 150 | 150 | 200 | 200 | 250 | 250 | 300 | 300 | 350 | 400 | 500 |
| Focal lengthnominal mm | 750 | 1200 | 900 | 1200 | 1200 | 1600 | 1200 | 1600 | 1600 | 1600 | 2000 |
| Focal Ratio | f5 | f8 | f4.5 | f6 | f4.8 | f6.3 | f4 | f5.3 | f4.6 | f4 | f4 |
| Tube Weightnominal kg | 4.5 | 5 | 7 | 8 | 11 | 12 | 14 | 16 | 20 | 29 | 40 |
| TubeDiameter mm | 167 | 167 | 225 | 225 | 280 | 280 | 326 | 326 | 385 | 434 | truss |
| TubeLength mm | 750 | 1110 | 860 | 1130 | 1140 | 1550 | 1160 | 1510 | 1540 | 1580 | 1945 |
| Tube Material | Alum. | Alum. | Alum. | Alum. | Alum. | Alum. | Alum. | Alum. | Alum. | Alum. | Alum. |
| SecondarySize mm | 50 | 37 | 63 | 50 | 63 | 50 | 75 | 63 | 75 | 82 | 100 |
| Mirror Cell | 9 point | 9 point | CNC 9point | CNC 9point | CNC9 point | CNC9 point | CNC 9point | CNC9 point | CNC9 point | CNC9 point | CNC9 point |
| Focuser | Focuser withreduction gearing | Focuser withreduction gearing | Focuser withreduction gearing | Focuser withreduction gearing | Focuser withreduction gearing | Focuser withreduction gearing | Focuser withreduction gearing | Focuser withreduction gearing | Focuser withreduction gearing | Focuser withreduction gearing | Focuser withreduction gearing |
| Mirror / TubeCooling | Fan | Fan | Fan | Fan | Fan | Fan | Fan | Fan | Fan | Fan | Fan |
| Tube Type | Alum. | Alum. | Alum. | Alum. | Alum. | Alum. | Alum. | Alum. | Alum. | Alum. | Alum. |