A look at solar eclipse

You are very fond of astronomy and read that tomorrow it will be possible to observe the solar eclipse. The eclipse of this kind occurs once in a thousand years and you have a chance to see this beauty. In honor of this event, you went to the observatory, which is located on the hills near your city. You agree that using a huge telescope and when entered the room, accidentally slammed the door. You can not hear and you need to find a way out.