Navitar 648MCL1028 Installation Instructions

Navitar/NuView Series 648 lens on 3M X70 & X80 projectors.

TOOLS REQUIRED: FLAT HEAD SCREWDRIVER 

Disassembly: 

1.  Disconnect unit from power source and place projector with lens facing up. Remove two 

(2) screws from bottom cover of lens. Remove cover and set aside for reinstallation.  

2.  Remove prime lens by depressing the lever on the left side of the prime lens and rotating 

the lens counter-clockwise. 

Assembly: 

1.  Ensure that your Navitar lens and its adapter are separate (except on MCZ275). Position 

the adapter with the ‘up’ label in the correct position and slide the adapter into the 

projector ensuring proper engagement. Rotate the lever counterclockwise until the 

adapter is securely in place.  

2.  Replace the front cover of the projector removed in step 2, above. 

3.  Install the lens by gently rotating clockwise as it is inserted into the adapter. 

To focus, gently twist the front of lens.  To zoom, loosen thumbscrew and 

twist knurled ring (zoom lenses only, of course).  Re-tighten thumbscrew.  

CAUTION: Do not twist entire lens out of adapter! ON MCZ275 models twist 

the inner knurled ring to zoom and twist the outer knurled ring to focus the 

lens.