| Answer | Crossword Clue |
|---|---|
| focusses | Adjust the focus of (a telescope, camera, or other instrument) |
| focusing | Adjust the focus of (a telescope, camera, or other instrument) |
| focussing | Adjust the focus of (a telescope, camera, or other instrument) |
| eyepieces | The lens or group of lenses that is closest to the eye in a microscope, telescope, or other optical instrument |
| eyepiece | The lens or group of lenses that is closest to the eye in a microscope, telescope, or other optical instrument |
| tempered | Tune (a piano or other instrument) so as to adjust the note intervals correctly |
| tempering | Tune (a piano or other instrument) so as to adjust the note intervals correctly |
