Used TPO 2" Deluxe Dielectric Mirror Diagonal - 11373 - SOLD

  • Price:
  • Sale
  • $89.00
  • Regular price $119.00

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Accessories Added

  • This is a used item in excellent condition*
  • 99% Reflectivity Dieletric Coatings
  • Maximizes Light Output
  • Comes with 2 inch to 1.25 inch Adapter


Used TPO 2" Deluxe Dielectric Mirror Diagonal - 11373 - SOLD

The Third Planet Optics 2 inch dielectric mirror diagonal features 99% reflectivity, dielectric coatings to maximize light output of your telescope system. Our custom made diagonal uses a BK7 mirror polished to 10th wave accuracy or better for best possible image quality.

The TPO 2 inch dielectric diagonal also features a CNC machined housing. This housing is designed to retain the optimal collimation of the mirror and assure the best optical performance. The CNC machined aluminum housing will provide outstanding results for years of use.

This diagonal also includes brass compression rings on both diagonal and the included 2 inch to 1.25 inch adapter, assuring gentle treatment of your eyepieces. Some other brands use set screw locking mechanisms that can mar the barrel surface of your favorite eyepieces. Avoid scratches and gouges by using the OPT dielectric series diagonals. The OPT dielectric diagonal is threaded to accept 2 inch filters.

Third Planet Optics dielectric diagonals provide outstanding performance with low prices to provide amateur astronomers with excellent value! OPT backs this diagonal with a full 2 year warranty against manufacturer defects.


Accessory TypeDiagonals
Barrel Size2"
Included AdaptersOne 1.25"
Optical Coatings99% Dielectric
Warranty90 Day


  • 2" dielectric diagonal
  • 2" to 1.25" adapter
  • Caps and original box
  • * There are a few set screw marks on 2" barrel *

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