When you find a telescope, especially one that’s been stored away, it’s important to handle it carefully to ensure you don’t damage anything. The presence of tape inside the lens or glass opening is unusual and likely not intended as part of the telescope’s original design. Here are some steps you can follow to address this situation:
Inspect the Telescope: Before doing anything else, examine the telescope thoroughly to understand its condition. Check all its components to assess if any parts are missing or need cleaning.
Identify the Tape’s Purpose: Carefully try to determine why the tape is there. In some cases, previous owners might use tape as a makeshift way to hold something in place. It might also be there as protective cover during transportation or storage.
Remove the Tape Safely: If the tape is not part of the original assembly and seems unnecessary, gently remove it. Be careful when doing this to avoid leaving sticky residue or causing any damage to the lens or housing.
Clean the Lens (if necessary): Use a lens-cleaning solution and a microfiber cloth to clean any residue left by the tape. Avoid harsh chemicals or rough materials that could scratch the lens.
Consult the Manual or Online Resources: If you have the user manual, refer to it for guidance. Alternatively, look for similar models online for guidance on proper setup and any missing components.
Test the Telescope: Once any unnecessary tape is removed and the lens is clean, test the telescope outdoors. Make sure that it functions correctly and that the view through the lens is clear.
Seek Professional Help if Needed: If you’re unsure about any step or if the telescope doesn’t work correctly after removing the tape, consider reaching out to an astronomy club or a professional telescope service. They can provide expert advice or assistance.

Handling the telescope with care and following these steps should help you get it in working order without causing any damage.