We recommend that coated glass gobos for the MAC 500 and RoboScan Pro 918 meet the following specifications:
- Coating: enhanced aluminum
- Glass type: high temperature, Borofloat or better
- Glass thickness: 1.1 mm
- Glass diameter: 27.8 +/- 0.2 mm
- Maximum image diameter: 23 mm
Gobos for the MAC 500 should be made with the artwork reversed on the coated side. For Pro 918 gobos, the artwork should be true on coated side. This orientation gives the best focus but is not critical.
We do not recommend using chrome coated glass gobos in these fixtures. They absorb more heat than enhanced aluminum gobos and are likely to break or oxidize. The lifetime of chrome gobos can be extended somewhat by inserting them with the coated side towards the lamp.