The Eyepieces


Making a 4.25 Inch Dobsonian Reflector Telescope




          The eyepieces for the telescope were purchased inexpensively from Surplus Shed a great resource for optics.  They are 0.965 inch eyepieces which I now consider little more than toys.   Only the longest focal length eyepiece is of much use.


          For those inclined to buy, I found a good article on what to consider.


          I did however as part of this project try to fabricate my own 1.25 inch eyepiece.   I purchased some lenses from Surplus Shed and then machined a barrel on a milling machine.   This was a fun project, but I don't recommend it unless it really appeals to you.   Along with the milling machine, it required the use of a rotating table, a special beveled bit for the curved outer surface.   To create the spacer/holders for the lenses I cut rings out of flat plastic using a laser cutter.   These machines are all standard at Tech Shop though you need some training to use them.



Side View




Back View