Current Price: $69.99
Buy It Now Price: $69.99
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USED

These 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 may need some light cleaning or have some slight nearly imperceptable scratches 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 would like.

3pc Set includes:
135mm Spherical Primary Mirror (FOCAL LENGTH: 1100mm) + Metal Cell
51mmX35mm Secondary Mirror + Metal Cell
Hardware to bolt to your own tube (OTA-Optical Tube Assembly)
2" Metal focus housing for tube with 170mm outer diameter.
OTA caps included.

ID (Inner Diameter) of primary and secondary Mirror Cells: 171mm

Collimation Dot

Diffraction limited optics (1/4 wve 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

Paint color on cell may vary --may be like photo(Charcoal) or maybe Gray or Black..but very similar

The
thin silver/chrome focus wheel cover plates shown in the photo MAY be
missing when you get your order. We DO try to ship with these attached
on but sometime they fall off in transit to and from Trade shows and we
do not stock these. They are cosmetic only.

FREE ship rate is for within the Continental U.S.

 

Filed under: Eyepieces & Accessories