3pc Set 135mm Spherical Primary Mirror/Cell, Secondary Mirror/Cell, 2" Focuser For Sale
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3pc Set 135mm Spherical Primary Mirror/Cell, Secondary Mirror/Cell, 2" Focuser:
LAST ONE AVAILABLE
These 3 components were removed from one of our Dobsonians (Galileo #G-135DB)
The metal reflector telescope mirror cells are designed for an 1100mm FL x 135mm Reflector Telescopes with a 170mm outer diameter OTA and have been used for display at trade shows.
Mirrors mayneed some light cleaningor have some slight cosmetic imperfections from handling. For those of you in the know, minor signs of use should not affect the views if you plan to build your own. We can include a copy of mirror cleaning instructions if you need. This set is in overall very good condition.
3pc Set includes:
* 135mm Spherical Primary Mirror (FOCAL LENGTH: 1100mm)+ Metal Cell
* 51mmX35mm Secondary Mirror + Metal Cell
* 2" Metal focus housing fortube with 170mm outer diameter.
OTA (Optical Tube Assembly) caps included.
Hardware to bolt to your own tube (OTA-Optical Tube Assembly)
ID (Inner Diameter) of primary and secondary Mirror Cells: 171mm
Diffraction limited optics (1/4 wave in Sodium Light)
Plate Glass (Both Primary & Secondary)
Aluminized (92%) and SiO(Quartz Overcoat)
Heavy Duty Push/Pull Collimation Screws on back of Primary Cell
4 Vane Spider Cell for Secondary (51mm X 35mm)
Secondary average obstruction: 25% (linear) app 6% total area.
Resolving power in arc seconds: 1.4
FREE ship rate is for within the Continental U.S.