Crayford Focuser
Here is a few pictures of the 1¼-inch Crayford focuser that I have built for the 41-cm telescope. The total height is 40 mm. The lower plate thickness is 6 mm. Below is a few pictures of the focuser. Click on the thumbnails to see a bigger picture.
 |
 |
 |
 |
| The focuser from the top. | The four roller bearings of the focuser. | The axle of the focuser. Between the axle and the set screw in the middle of the photo is a piece of teflon. Pressure on the axle can be changed with the set screw. On the right is knob for focusing by hand. | The gear and worm gear for motor control of the focuser. The gear can be fastened or loosend to the axle by the brass knob in the middle of the gear. |