TPO 2" Deluxe Dielectric Mirror Diagonal

  • Sale
  • Regular price $108.95
  • TPO 2" Deluxe Dielectric Mirror Diagonal

    • Sale
    • Regular price $108.95
    • ITEM #



    • 99% Reflectivity Dieletric Coatings
    • Maximizes Light Output
    • Comes with 2 inch to 1.25 inch Adapter

    TPO 2" Deluxe Dielectric Mirror Diagonal

    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.

    TPO Product Number: OS-D2DI

    Additional Information

    Accessory TypeDiagonals
    Free ShippingYes
    Included AdaptersOne 1.25"
    Optical Coatings99% Dielectric
    Warranty2 Year Warranty

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    Questions & Answers

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    • Does this work with Celestron visual backs? Celestron diagonals have a fitting that threads onto the visual back.

      This diagonal has a 2" nosepiece for refractors and SCT's with 2" Crayford focusers. You would want to use the OS-D2SCTDI version, which has the threaded attachment to go on the back of an SCT visual back.

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