nPAE Theia90 Collimating Star Diagonal and Filter Changer

  • 1/10th Wave Star Diagonal with filter changer and micro meter tip/tilt adjustable mirror
  • Comes with 3 filter holders
  • Hard carry case included
  • Filters shown are not included
  • Sale
  • Regular price $508.20

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nPAE Theia90 Collimating Star Diagonal and Filter Changer

The Theia90 1/10th wave star diagonal is a combined star diagonal and filter changer, with a micro meter tip / tilt adjustable mirror.

Load up your filters in advance into our quick change filter holders and you can rapidly swap from one filter to another. Using high power magnets to hold the filters in place you can meridian flip the telescope and not drop the filters. When you want to change you simply pull the filter out and replace it.

The diagonal uses a 46mm minor axis mirror with 1/10th wave finish and each unit comes with an individual Zygo report so you can be sure of its quality.

Using the 4 screws on the back the position of the mirror can be altered to help collimate your telescope. The unit comes in a sturdy case. Supplied with 3 filter holders. Additional holders can be purchased


Angle90 degree
Diagonal Barrel Size2"


  • Theia 1/10th Wave Mirror Star Diagonal Body
  • Light Baffled Nosepiece
  • Zygo Report
  • Three 2" Filter Holders
  • Hard Carry Case
  • Instructions