31. Remove the lens cap from the projector, and then carefully insert the optional lens into thelens mount.• Cleanly wipe off the lens and inside of the lens barrel, and insert the lens straight in. Insertion at a skewed anglemay damage the lens or lens mount.2. Align the screw thread of the lens with that of the lens mount and turn the lens clockwise untilit sits in lens mount firmly.3. Screw the lens setscrew (supplied with the lens) into the screw hole at the top of the lensmount, and tighten with the hex wrench key (supplied with the lens).• Be sure to tighten the lens setscrewfirmly.A loose setscrew could eventuallyallow the lens to fall off the lens mount.HANDLING CAUTIONS• Before mounting or replacing the projection lens, check to make sure that the projector has been turned off.• Do not power up the projector with no lens installed.• Whenever removing the lens from the projector, be sure to first remove the lens setscrew.• While carrying the projector, exercise care not to jolt the lens by accidental contact with heavy objects. Remove thelens whenever transporting the projector.NoteNoteREMOTERGB OUTOUTWIREDININOUTINR/R-Y/P R G/Y SYNC/HD VDB/B-Y/PBIN OUT OUTOUTIN RLUSB SERIALS-VIDEO IN AUDIO IN RGBAUDIO AUDIOVIDEORGB 2 INOUTIN DVI-DRGB 1 IN> PC < TBMU152Lens (optional)Focus ring Lens portProjectorZoom ringLens setscrew(supplied with lens)Lens setscrewholeHex wrench key(supplied with lens)ADJUSTING THE LENSREMOTERGB OUTOUTWIREDININOUTINR/R-Y/PR G/Y SYNC/HD VDB/B-Y/P BIN OUTOUTIN RLUSB SERIALS-VIDEO IN AUDIO IN RGBAUDIO AUDIOVIDEORGB 2 INOUTIN DVI-DRGB 1 IN> PC < TBMU152Focus ring fixing screwINSTALLING THE LENSPerform focus and picture size adjustments while viewing images on the screen:1. Adjust the focus with the focus ring.2. Fit the picture size to the screen size with the zoom ring.• When using the fixed focus lens (ET-LE050), fit picture size to the screen by moving the projector back andforth.3. Perform fine focus adjustment with the focus ring.• When using the fixed focus lens (ET-LE050), perform the fine focus adjustment, and then lock the focus ringwith focus ring set screw.