Shorter diagonal.

[rcheshire]

I have a 50mm Borg finder scope with a helical focuser and would like to fit a diagonal, 45 or 90. The 90 I have is too long and cannot reach focus without removing the focuser and fitting an extension tube which places the diagonal and eyepiece closer to the objective.

I need to move the diagonal about 5 or 10mm closer to the objective, while retaining the focuser. I imagine a diagonal eyepiece combination with a shorter light path. More compact.

[Merlin66]

Rowland,
Have you tried with a prism diagonal?

[rcheshire]

Hi Ken. No. I have very little observing gear. Looks like a new learning curve. Its not a critical application so inexpensive is good.