Backyard Universe Secondary Mirror Spider for Sky-Watcher 250mm Newtonian Telescopes
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Backyard Universe Secondary Mirror Spider for Sky-Watcher 250mm Newtonian Telescopes

£235.00
  (1 Review)
✓ 2 year warranty

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2x in stock shipped 1-2 working days

About this product

Model:  bu_sms_sw250
Part Number:  BU2022-010

Backyard Universe Upgraded Secondary Mirror Spider for Sky-Watcher 250mm Newtonian Telescopes

CNC milled secondary mirror spider made of aluminium (EN AW-6061), matt black anodised, suitable for Skywatcher 250PDS/Quattro

This secondary mirror spider is manufactured on a modern CNC machining centre. The high-precision manufacturing ensures that the 1.8mm thick struts of the spider are perfectly aligned, and the diffraction-related spikes on bright stars appear razor-sharp. The light, stable design, optimised by FEM simulation, also significantly improves the collimation stability of the Newtonian.

 

What's In The Box

  • 1 x secondary mirror spider suitable for e.g. Skywatcher 250PDS / Quattro (tube inner diameter 286mm), matt black anodised
  • 4 x fastening screws M5x6 (for fastening in the tube)
  • 3 x stainless steel studs M4x25 (with tip) for collimation
  • 3 x studs M4x25 (with conical head) for collimation (black)
  • 1 x stainless steel fastening screw M5x35 for fastening the secondary mirror holder
  • 1 x stainless steel disc 40x15x1.5 (for the optional optimisation of the secondary mirror holder)

Customer reviews

Average Rating (1 Review):  
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Effective
17 June 2024  | 

Works well and easy to fit to a 10 carbon Quattro. Not sure how the cost is justified though.

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