Quote:
Originally Posted by silv
ah! I had come across that term "extension tube" but only now I understand what it is for. thank you 
hm. that means I would use the focuser wheels. okay. I understand.
i don't really want to move the primary mirror... was it difficult? |
It is not difficult to move primary. First you test your setup on star and see if it comes to focus or not. I have skywatcher 200mm f/5 which comes with extension tube, so I believe I can get the focus with prime focus(still need to try).
I used long screws and spring bought from bunnings to achieve focus the my old f/4. The other alternative is cut the tube.