folded newt info

Thanks for everyone's input on the fan front or bakc question ... scope is complete and working great - no vibrations from the fans ...

Can anyone recommend a scope building book or other written material for for folded newts?

Thanks in advance,

Dan

The program NEWT.EXE or NEWT2.EXE will lay out any Newtonian optical assembly. In place of a standard elliptical flat at 45*, a near round mirror at some other angle (even one at square on for a three-mirror) is used to push the focal point back down the tube's length.