1. Dust protection:
○ Use masking paper to seal the copper mouth to prevent dust from entering.
○ Before operation, seal the cavity with a dust-free cloth to prevent dust contamination.
2. Dry and clean environment:
○ Perform testing and cleaning in a dry, clean environment.
○ Use special paper when cleaning the lens, and use an ear-sucking ball to blow away the dust on the mirror surface.
3. Regular cleaning:
○ After installing the new lens, clean it regularly to ensure a clear light path.
○ Avoid damage and contamination, and pay attention to regular maintenance of lenses.
4. Handle with caution:
○ Be careful when taking the lenses out of the box to avoid damage.
○ Do not apply pressure to the lens before opening the wrapping paper.