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A few years ago, I began grinding a 13.1” mirror blank to build a Newtonian Reflector Telescope. Injuries, however, have prevented me from finishing the job. My loss is your gain!

I am selling the following parts to build your own telescope:

13.1” Pyrex glass concave mirror blank, ground to spherical shape, ready to be parabolized. The glass is rated for an f/4.5 focal ratio, without losing accuracy due to temperature expansion/contraction. The glass is presently ground with focal length of approx. 131” and f-ratio of about 10. Some fine grinding and polishing required. If “faster” f-ratio is desired, course and fine grinding will be required.

13.1” convex matching Pyrex blank for grinding concave mirror blank.

13-7/8” x 14-1/2” heavy duty 4-vane spider mount for diagonal mirror.

1.83” Diagonal Mirror Holder.

1.83” Diagonal Surface Mirror with 1/20 wave accuracy.

2” diameter Eyepiece Focuser.

Telrad Reflex Sight (to position telescope).

14 inch diameter by 10 foot Sonotube (to mount optics in).

You will need a truck or trailer to haul the Sonotube because of its 10 foot length and diameter.

I have researched today’s prices on the parts, and the total ranges from $600 to $700. As you can see, my asking price is a great bargain!