| Answer | Crossword Clue |
|---|---|
| TRING | Camera-to-telescope adapter |
| 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) |
| heliographs | instrument for photographing the sun, consisting of a camera and a specially adapted telescope |
| heliograph | instrument for photographing the sun, consisting of a camera and a specially adapted telescope |
