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Tele Vue SCT RitchField Kit with 2 inch 90 degree Everbrite diagonal and 1.25 inch adapter for Celestron C8

Tele Vue

Tele Vue SCT RitchField Kit Celestron C8 2" 90° Everbrite Diagonal 1.25" Adapter

SKU CH-VMW6-XYK54

A kit adding a 2" 90° Everbrite diagonal, 1.25" adapter and SCT visual back to a Celestron C8 for brighter, whiter views

  • 99% reflective dielectric coating delivers brighter, whiter images
  • 1/10 wave Pyrex mirror flatness ensures sharp, high-contrast views
  • One-piece aluminum body prevents misalignment under heavy accessories
  • Brass clamp ring secures eyepieces without marring barrels
  • 2" to 1.25" adapter adds flexibility for different eyepieces

Kit contents and intended users

The Tele Vue SCT RitchField Kit equips a Celestron C8 telescope with a 2" 90-degree Everbrite dielectric diagonal, a 2" to 1.25" eyepiece adapter and an SCT visual back. It serves observers who want a single package to accept both 2" and 1.25" eyepieces on this specific Schmidt-Cassegrain model.

Optical performance and light transmission

The Everbrite diagonal uses a dielectric coating rated at 99% reflectivity across the full visual spectrum, producing whiter and brighter images. Its Pyrex mirror is figured to 1/10 wave flatness and each unit is optically inspected to preserve the telescope's native resolution.

Mechanical build and daily handling

The diagonal body is precision-machined from solid aluminum with a one-piece construction that prevents heavy accessories from unscrewing the barrel. A brass clamp ring secures eyepieces without marring barrels, and the included adapters thread directly to the C8's rear cell for a rigid, repeatable connection.

Highlights

  • 99% reflective dielectric coating delivers brighter, whiter images
  • 1/10 wave Pyrex mirror flatness ensures sharp, high-contrast views
  • One-piece aluminum body prevents misalignment under heavy accessories
  • Brass clamp ring secures eyepieces without marring barrels
  • 2" to 1.25" adapter adds flexibility for different eyepieces

Specifications

No published specifications for this item yet.

Questions about this item

How do I attach the SCT visual back to my Celestron C8, and what step prevents the diagonal from unscrewing under load?

Thread the SCT visual back onto the C8 rear cell, then insert the 2" Everbrite diagonal into the visual back and tighten its brass clamp ring; the diagonal's one-piece machined body stops heavy accessories from forcing the barrel to unscrew.

What maintenance will the Everbrite dielectric coating need over time?

The 99% reflective dielectric coating on Pyrex with 1/10 wave flatness is sealed and requires no recoating; only occasional gentle cleaning with optical fluid and a lint-free cloth if dust or dew settles on the mirror surface.

At what point does the 1.25" adapter become the limiting factor during extended viewing sessions?

The 1.25" adapter restricts the field stop to 1.25" eyepieces, so wide-field 2" oculars cannot be used once the adapter is in place, limiting maximum true field during long observing runs.

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