- Dec 30, 2016
I think we're both beginning to get a handle on what is really possible without breaking the bank !
Oh i get it, How are you going to use a bigger lens with it ?The sanwu 3X is 2 parts that screw together, each houses 1 lens and you have a dozen or more rotations to move it's lenses apart 3/4 of an inch, so you can make small adjustments that hold, now if the sliding ratio has a longer " stroke " then it may be easy to focus to a point at distance, but the longer the distance the more fine the adjustment needs to be.
That is a 1/64 rotation has more effect at 80 feet than 16 feet, you may want 1/128 of a rotation at longer distances to fine tune the spot size.
You might want use the Galilean type expander instead of the Keplerian type you use now.I'm not right now, not with threads that is, I am going to test 2-3.5 inch PCX and aspheric lenses with a nubm44 and a G2 and work with the G2's focus, then with a 44 and G2 with 6X correction and the larger lenses, I will use card stock sliders for testing, once I have found what works best I will decide if it can be finished as a slider or if I need to have a threaded adjuster lens holder made.
But I have to at least use the card stock sliders, just holding the lenses by hand is very difficult to align at 80 feet.
I may also test the 4 inch aspheric with the raw diode output, but again I must make at least a cardstock holder/slider to keep the diode window clean and maintain alignment.