Celestron 48mm T-Adapter for EdgeHD 9.25", 11", and 14" Optical Tubes (#93622)
Maximize Your Full-Frame Sensor—With the Adapter It Deserves
Today’s astroimaging cameras and DSLRs often feature full-frame sensors—but if your adapter bottlenecks the light path, your sensor’s corners won’t get the light they need. The Celestron 48mm T-Adapter solves that problem by providing a wider optical opening than the standard 42mm T-thread, allowing the entire light cone from your EdgeHD 9.25", 11", or 14" OTA to reach your camera without vignetting.
If you're serious about deep-sky astrophotography and you’re working with a full-frame imaging setup, this is the adapter your telescope has been waiting for.
Why 48mm Matters
Celestron's standard T-adapters feature a 42mm T-thread, which is perfectly fine for APS-C and smaller sensors. But on full-frame chips, that smaller thread diameter clips the light cone, causing noticeable vignetting—darkening of the image corners that reduces your usable field.
The 48mm T-Adapter offers a larger aperture, preserving the light path and enabling your sensor to fully capture the wide, flat field that the EdgeHD optical design is known for. The result? Brighter corners, better contrast, and more usable pixels in every exposure.
Precision Fit for EdgeHD 9.25", 11", and 14"
This adapter threads directly to the rear cell of your EdgeHD OTA, placing your imaging sensor at the proper backfocus distance for optimal image sharpness and field flatness. It works seamlessly with any 48mm T-Ring matched to your camera brand (sold separately), creating a secure, threaded connection ideal for long exposure imaging sessions.
This is a mechanical adapter only, with no optics to degrade the signal. Just clean, solid, properly spaced light transmission—exactly as your telescope intended.
Important Compatibility Notes
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This adapter is specifically designed for EdgeHD 9.25", 11", and 14" OTAs. It is not compatible with EdgeHD 8", SCTs, or other optical designs.
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Requires a 48mm T-ring, not the standard 42mm version.
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If you're using an APS-C or smaller sensor, Celestron recommends the standard 42mm T-Adapter (#93646) instead, as vignetting is not a concern with smaller chips.
Final Thoughts
If you're imaging with a full-frame DSLR or astronomical camera and you own a larger EdgeHD OTA, the Celestron 48mm T-Adapter is a smart, simple upgrade that unlocks the full potential of your gear. It preserves the wide-field performance you paid for, eliminates unnecessary vignetting, and ensures you’re using every last millimeter of your sensor’s real estate.
Don't let a narrow adapter limit your sky.
Specifications
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Thread Size (Camera Side): 48mm T-thread (M48 x 0.75)
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Thread Size (Telescope Side): Compatible with EdgeHD 9.25", 11", and 14" rear cells
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Backfocus: Matches standard EdgeHD backfocus requirements when paired with appropriate camera and T-ring
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Compatibility:
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Celestron EdgeHD 9.25"
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Celestron EdgeHD 11"
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Celestron EdgeHD 14"
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Material: Anodized aluminum
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T-Ring Required: Yes, 48mm size (sold separately)
