Description:* Warranty: 6 months.* Glass lens NOT Resin lenses. Stable performance: never deformation, long-term use.* Installed as shown in the figure(7): Crescent gap down, then put the mirror on.* Compatible with: For Optoma HD20 HD23 HD66 HD180 HD200X GT750 projector* Package include: one projector len for you.
If image of the projector is displayed only all around, the middle is very dark and even can\'t see???This indicates that the lens has gone bad. Please replace it directly. Resin len surface is not as hard as the glass lens, easily to produce scratches. Should be avoid scratches and fingerprints during installation.We suggest using glass instead of resin lens. GLASS lens Replacement for Optoma HD20 HD23 HD66 HD180 HD200X GT750 projector lens Installed as showed in the figure 5: Crescent gap down, then put the mirror on. Brand NEW and 100% Quality Guarantee.