We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Machined aluminium adapter with black anodised finish, 38mm long, threaded for large SCT and EdgeHD scopes

Celestron

Celestron Large SCT & EdgeHD Adapter V2 for Off-Axis Guider 9.25 11 14 38mm

SKU CH-ZDFY-EK4P4

Adapter connects large Schmidt-Cassegrain and EdgeHD telescopes to an off-axis guider with 38 mm back-focus spacing for 9.25, 11 and 14 inch apertures

  • Larger illuminated field for 9.25", 11" and 14" scopes
  • Full-frame cameras utilise the complete image circle
  • 38 mm optical length gives correct DSLR back-focus
  • No extra spacers needed with Off-Axis Guider
  • Machined aluminium with sandblasted interior reduces reflections

Celestron Adapter for Large SCT & EdgeHD Scopes

This adapter connects a camera to Celestron 9.25", 11", and 14" Schmidt-Cassegrain or EdgeHD telescopes for off-axis guiding. It provides a larger area of illumination to support full-frame sensors such as those in the Canon 5D or 6D. The machined aluminum body with black anodized finish and sandblasted internals ensures durability and reduces internal reflections.

Replaces Shorter Adapters Requiring Extra Spacers

The 38mm optical length supplies the necessary back-focus spacing for DSLR cameras when used with an Off-Axis Guider. This eliminates the need for additional adapters or spacers that shorter versions require. The upgrade is worth it when your current adapter cannot reach focus or vignettes the sensor on these larger optical tubes.

Fits Large SCT & EdgeHD Rear Cells

The adapter threads onto the telescope rear cell and accepts the Off-Axis Guider, creating a stable, vibration-resistant connection. It frees up the imaging train by removing separate spacer rings and compensates for the longer back-focus demand of DSLR bodies. Compatibility is limited to the listed 9.25", 11", and 14" Schmidt-Cassegrain and EdgeHD models.

Highlights

  • Larger illuminated field for 9.25", 11" and 14" scopes
  • Full-frame cameras utilise the complete image circle
  • 38 mm optical length gives correct DSLR back-focus
  • No extra spacers needed with Off-Axis Guider
  • Machined aluminium with sandblasted interior reduces reflections

Specifications

No published specifications for this item yet.

Questions about this item

What telescope sizes does the 38 mm adapter fit?

The adapter is made for Celestron 9.25", 11" and 14" Schmidt-Cassegrain and EdgeHD optical tubes.

How is the adapter attached to the off-axis guider and what step is often missed?

Thread the adapter onto the rear cell of the telescope, then secure the off-axis guider to the adapter; the step often missed is confirming the 38 mm optical length provides the required back-focus for your DSLR without extra spacers.

What upkeep will the machined aluminum adapter need over time?

The black anodized finish and sandblasted interior resist corrosion; occasional cleaning of the threads and a visual check for thread wear are the only maintenance required.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.