|
Update: Finished all the assembly so that I can test to confirm the secondary and focuser placement. The various Newtonian design apps around on the Net calculate on visual model so they are only rough guides at best for an imaging scope - which has to fully illuminate a sensor. Imaging newts also have larger secondaries than visual scopes, so the app calcs related to the secondary size, placement, offset, etc can't be relied on, and placement has to be confirmed by actual testing. Use of cable ties to hold the front ring and focuser are to allow the movement of these components during testing to fine tune the placement of the focal plane on the camera sensor. Once placement is confirmed those components will be epoxied in place and the plastic sleeving on the tubes removed.
Latest photos are attached.
|