13
Cleaning the Lenses and Reflector
Replace lenses if they contain visible damage (cracks or deep scratches) that may impair their
effectiveness.
Cleaning Glass Lenses
Figure-13 Internal Glass Lenses.
Step 1:
Remove the barrel.
Refer to
Removing and Installing the Barrel, page 6
.
Step 2:
If needed, move the lenses to access both sides of the lenses.
Step 3:
Remove dust with a blast of oil-free air or wipe with a clean, lint-free cloth. Isopropyl
alcohol, distilled water or a 50%-50% mixture of each can be used to clean the glass
surface.
Step 4:
If the reflector needs to be cleaned, refer to
Cleaning the reflector, page 14
.
Step 5:
Return the lenses to the required positions if needed.
Step 6:
Replace the barrel.
W A R N I N G :
Do not use ammonia-based or other harsh commercial cleaners. Clean lens
and reflector only as directed.
Commercially available glass cleaning agents should be avoided as they
may contain ammonia, other harsh chemical detergents or abrasive agents.
These cleaners may damage the glass surface and the Anti-Reflective
coatings. Do not immerse or soak the glass in any cleaning solution.
Focus lens
Field lens
Reflector
