Cloud Break Optics

Celestron 11", 14" SCT to OPTEC-4300 Adapter (19838)

Celestron 11", 14" SCT to OPTEC-4300 Adapter (19838) - Main image
$82.35 $135 In stock

Category: Astrophotography Accessories

Description

The #19838 adapter converts the larger 3.29-inch rear cell thread on the back of Celestron's some 9.25', all 11" and 14" class SCT and EdgeHD OTA's to a male OPTEC-4300 dovetail standard.  This adapter allows attachment of Optec's Gemini Focusing Rotator or TCF-Lynx3 Gen2 3-inch focuser.

Specifications

Inside Diameter: 3.15" (80mm)
Outside Diameter: 4.95" (125.6mm)

Overall Height:

0.52" (13.2mm)
Clear Aperture: 3.15" (80mm)
Weight: 6.4 oz (180 g)
Back-Focus Usage: -0.22" (-5.6mm)

Note that most SCT back-focus distance measurements are made from the TOP of the threads.  Thus, some adapters can have a negative back-focus consumption or usage when the focuser actually rests below the top of the OTA threads.

Compatibility

  • Celestron Classic 11" and 14" SCT telescopes,
  • Celestron EdgeHD  9.25" SCT telescope,
  • Celestron C1100 EdgeHD 11" SCT telescope,
  • Celestron C1400 EdgeHD 14" SCT telescope,
  • Gemini Focusing Rotator,
  • TCF-Lynx3 Gen2 Focuser,
  • Any OPTEC-4300 receiver adapter.

Optec's #19838 adapter converts the larger 3.29-inch rear cell thread on the back of Celestron's some 9.25', all 11" and 14" class SCT and EdgeHD OTA's to a male OPTEC-4300 dovetail standard.


Before you pay

Check the method and total at checkout.

When it ships

Allow for processing time as well as the journey to you.

Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

View policy
If you need a refund

Keep your order number and contact the store to start.

Please contact us for the refund processing timeframe before returning an item.

View policy
Delivery costs

Review the cost for your destination and chosen service.

Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

View policy
Returning an item

Check the return conditions before sending anything back.

United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

View policy

Customer Reviews (5.0 / 5 · 5 reviews)

Edward C. ★★★★★

I needed this adapter to attach my camera rig to the telescope's rear cell, and the fit is absolutely perfect with no wiggle. The brass compression ring locks snugly without scratching the threads, which was my biggest worry.

Samuel ★★★★★

The threading on this adapter is smooth and precise—it screwed onto my 11” SCT rear cell without any wobble, which made switching my OPTEC-4300 gear a breeze. Weight feels solid, not flimsy like other aftermarket adapters I’ve tried.

Richard ★★★★★

Finally, an adapter that actually fits flush against the rear cell without any wobble — the threads engaged smoothly right from the first turn. I've been fighting with loose connections for months, and this solid dovetail mount solved it immediately.