Before I cut the truss'sPosted By Sonya Ward |
Hi Astro folks,
I am finishing up a 16" truss type dob. My question is which size eyepiece should I use to check focal lenght on before cutting the truss tubes. How much travel should I expect in the focuser. ( would hate to fine out after I cut them too short.)
Thanks
Sonya
I am finishing up a 16" truss type dob. My question is which size eyepiece should I use to check focal lenght on before cutting the truss tubes. How much travel should I expect in the focuser. ( would hate to fine out after I cut them too short.)
Thanks
Sonya