R5906112 /09 UDX series192
12.1 Cleaning the lens
To minimize the possibility of damage to optical coatings, or scratches to lens surfaces follow the
cleaning procedure as described here precisely.
Required tools
• Compressed air
• Clean micro fiber lens cleaning cloth (e.g. Toraysee® cloth(s))
• Clean cotton cloth
• Lens cleaner (e.g. ZEISS lens cleaner, Purosol™ or other water based lens cleaner products)
How to clean the lens?
1. Blow off dust with clean compressed air (or pressurized air cans
8
) .
2. Clean with lens cleaner together with a clean lens cleaning cloth to remove the dust and contamination. Use
big wipes in one single direction.
Warning: Do not wipe back and forwards across the lens surface as this tends to grind dirt into the
coating.
3. Use a dry lens cleaning cloth to remove left liquid or stripes. Polish with small circles.
4. If there are still fingerprints on the surface, wipe them off with lens cleaner together with a clean lens cleaning
cloth. Polish again with a dry one.
If smears occur when cleaning lenses, replace the cloth. Smears are the first indication of a dirty
cloth.
Maintenance
8: Pressurized air cans are not efficient if there is too much dust on the surface, the pressure is too low
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