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This is a special spider, designed to minimize / eliminate  visible diffraction patterns. It is made primarily of aluminum, making it lightweight. The unique center bolt, Spring, and Tensioning Nut, make collimation simple and easy while allowing a large range for adjusting.

It features:

  • Easy Front Access to Thumb Collimation Screws
  • Constant tension of diagonal to Collimating Screws, make collimation easier than ever, and eliminating the need to tie down the final collimation position.
  • Vanes have Clinch Nuts built in and come with black mounting screws
  • Aluminum block with vanes 1 1/2 tall by 1/8 thick (Block or Vanes maybe substituted for special needs)
  • This Curved Vane Spider is designed for large telescopes and can handle large secondary mirrors.
  • This Curved Vane Telescope Spider comes with a secondary holder.


  Minimum Maximum
Diagonal Size 2.5 inch Let us know and we will make it work
Spider Size 16 inch

Available Options:
Clinch Nut Size
Stainless Steel Mounting Screws (+$5.00)
What is your tube thickness?
This product was added to our catalog on Thursday 05 January, 2012.
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