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Black PETG Tri-Bahtinov mask for Celestron C8 EdgeHD telescope, focusing and secondary mirror alignment tool.
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  • Black PETG Tri-Bahtinov mask for Celestron C8 EdgeHD telescope, focusing and secondary mirror alignment tool.
  • Tri-Bahtinov Mask for Celestron C8 EdgeHD
  • Tri-Bahtinov Mask for Celestron C8 EdgeHD
  • Tri-Bahtinov Mask for Celestron C8 EdgeHD

Tri-Bahtinov Mask for Celestron C8 EdgeHD

€29.90
Tax included

Instantly maximize the optical tracking potential of your Celestron C8 EdgeHD aplanatic tube. Achieve micrometric focus and precise secondary mirror collimation simultaneously.

  • 🔄 Simultaneous Dual Action: Tune focus and 3-axis optical collimation in real-time right on your star diffraction spikes.
  • ⚠️ EdgeHD Strict Dimensions: Custom-modeled for the unique outer diameter of the front EdgeHD cell (not compatible with standard XLT C8).
  • 🛡️ Soft Felt Rim Protection: Inner rim lined with high-grade felt padding to shield your telescope's paint from scratches.
  • 💎 Premium Black PETG Matrix: 100% opaque, dew and cold resistant build yielding sharp, high-contrast diffraction spikes.
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Tri-Bahtinov Mask — Celestron C8 EdgeHD

Absolute precision for aplanatic tracking, planetary targets, and deep-sky imaging

The Celestron C8 EdgeHD telescope is a gold standard for high-resolution astrophotography, excelled in high-magnification planetary tracking or long-exposure deep-sky setups (including f/2 configuration via Fastar/Hyperstar systems). However, to make the integrated coma-correctors deliver pin-sharp stars to the very edge of your sensor, your optics demand two mandatory elements: a surgical focus and a flawless secondary mirror collimation.

🔭 The Tri-Bahtinov Advantage: Double Tuning in a Single Step

🎯 Live Focus & Collimation

Unlike standard focus masks that only track focus accuracy, the patented geometry of the Tri-Bahtinov is split into three separate sections oriented to face your secondary mirror screws (stock screws or Bob's Knobs updates). By analyzing star diffraction patterns on-screen, you tweak alignment and focal crispness simultaneously.

⚡ Streamlined Performance

When the central spike lines intersect perfectly across all three axes, your telescope is optimized to track. No more guessing on dancing Airy disks or throwing away processing sub-exposures: alignment turns into a fast geometric check, maximizing your actual night imaging data.

Exclusive Match for the C8 EdgeHD Front Housing

⚠️ Verify your telescope cell: The front cell housing of the EdgeHD telescope features specific integrated vents and structural steps distinct from older XLT C8 frames. This mask has been modeled specifically to slide perfectly over the EdgeHD's unique outer rim:

  • Flawless External Slip-On Fit: Seamlessly seats over your 8-inch optical barrel opening. Avoids coarse plastic locking knobs that scratch scope finishes or introduce mechanical axis offset. The mask remains perfectly centered and coaxial to your primary glass, regardless of your mount orientation.
  • Non-Marring Protective Felt Lining: To protect your Celestron telescope housing, we pre-install a continuous, high-grade soft felt strip inside the inner flange ring. Acting as a cushioned buffer, it absorbs mechanical friction during placement, avoiding paint scratches while maintaining a stable hold.
  • Premium Grade Black PETG Print: Our focus mask is manufactured using technical PETG polymer, selected for its superior dimensional stability against night weather elements (heavy dew, freezing frost). Unlike generic PLA components, our PETG won't warp or sag if exposed to direct day sun. Its 100% opaque black tint kills light leakage to ensure highly defined camera spikes.

"The internal correctors on the EdgeHD series do a phenomenal job sharpening star clusters, but they also amplify the tiniest secondary tilt issues. The Tri-Bahtinov fully eliminates guesswork from the equation. It is an indispensable field upgrade tool whether you are tracking planetary details at f/10 or running wide-field targets at f/2 with an Hyperstar module."

— Vincent, Founder of Azur3dprint

Technical Specifications

  • Strict Compatibility: Celestron C8 EdgeHD optical tubes exclusively (Does NOT fit regular XLT C8 units).
  • Core Use: Dual-action micrometric focus tracking + Simultaneous 3-axis secondary collimation.
  • Material Base: Technical high-durability UV and impact-resistant Black PETG matrix.
  • Internal Lining: Comprehensive non-abrasive soft felt scratch-guard ring insert.
  • Mount Style: Direct sleeve slip-fit utilizing gentle perimeter friction.
SC8_Hd

Data sheet

Type de filament
Petg
Colour
Black
New