How to handle optical filter properly?

Wear finger cots. Substances like acids and salts can corrode the surface of glass. Direct contact with optical lenses using bare hands can leave marks. If not cleaned off for a long time, these can become permanent blemishes that affect the image quality of optical components.

Handle with care. Many optical lenses are made of glass and are susceptible to being scratched, chipped, or cracked. Always hold the edges of the lens and avoid direct contact with the light-transmitting surface, even when wearing finger cots.

When not in use, place the lenses on a soft surface. Do not place bare lenses directly on glass, metal, desktops, or unclean paper surfaces, as this can easily scratch the lenses.

If there is dust on the surface of the lens, use a clean ear syringe to blow the dust off.

If there are stains or sweat marks, gently clean them using lens paper or silk cloth dipped in alcohol or acetone.

For storage, wrap the lenses in clean capacitance paper or lens paper. Store them in a moderate temperature environment (around 23°C) with humidity below 40%. If possible, keep them in a dry cabinet.

Do not stack optical lenses on top of each other. Each lens should be placed without overlapping.

If the lens becomes dirty, clean it immediately, but be careful to avoid scratches as dust can easily scratch the lens.