ZWO EAF PRO Autofocus Motor Kit for Samyang / Rokinon 135 F/2
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  • ZWO EAF PRO Autofocus Motor Kit for Samyang / Rokinon 135 F/2
  • ZWO EAF PRO Autofocus Motor Kit for Samyang / Rokinon 135 F/2

ZWO EAF PRO Autofocus Motor Kit for Samyang / Rokinon 135 F/2

€22.50
Tax included

Unlock sub-pixel automated focusing on your Samyang/Rokinon 135mm F/2 lens with the ZWO EAF Pro Motor Kit.

  • 🎯 Pinpoint Autofocus: Automated V-curve autofocus routines via ASIAIR, N.I.N.A., SGP, or Ekos.
  • 💎 Carbon-Fiber PETG: Rock-solid motor bracket delivering zero flexure and consistent belt tension.
  • 📦 Complete Mechanical Pack: Includes EAF bracket, lens focus ring gear, GT2 pulley, custom GT2 belt, and 4x M4x8 stainless screws.
  • ⚠️ Motor Shaft Selection: Choose between standard 5mm EAF and the updated narrow-shaft EAF-N / EAF Pro.
Selecting the ZWO EAF Version: EAF (previous generation)
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ZWO EAF "PRO" Motor Kit — Samyang / Rokinon 135mm F/2

Carbon-Fiber PETG precision electronic focusing bracket for astrophotography

At f/2 wide-open aperture, the Samyang / Rokinon 135mm F2 ED UMC is a legendary wide-field astrograph. However, its critical focus zone (CFZ) is razor-thin: minor nighttime temperature drops quickly introduce soft stars. The Azur3dprint ZWO EAF Pro Motor Kit delivers a rigid, custom-modeled solution to mount your ZWO Electronic Automatic Focuser (EAF) directly onto your Azur3dprint Samyang 135 mounting bracket.

🔬 Precision Drive Mechanics for Backlash-Free Calibration

⚙️ Smooth GT2 Timing Drive

Pairing a custom-profile lens focus ring gear with a matching motor pulley and closed-loop GT2 synchronous timing belt provides smooth, non-slip rotation and reliable V-curve repeatability.

💎 Carbon-Fiber PETG Matrix

Printed in carbon-fiber reinforced PETG polymer, the mounting plate provides extreme torsional stiffness. It keeps belt tension stable and eliminates flexure under night dew and cold weather.

⚠️ Critical: Verify Your ZWO EAF Motor Version

ZWO updated its EAF motor hardware over recent production runs. The motor drive shaft diameter varies:

  • Classic Standard EAF: Features a standard 5 mm motor shaft.
  • Updated Version (EAF-N / EAF Pro): Features a narrower shaft profile.

👉 Please select the correct shaft diameter option from the drop-down menu. In case of doubt, measure your motor shaft with digital calipers prior to ordering.

Seamless Integration for Azur3dprint Samyang Mounting Rings

This kit is dimensioned to attach directly to the Azur3dprint Samyang 135mm lens tube ring cradle:

  • Direct Bolted Interface: Anchors firmly using 4x M4x8 mm stainless steel bolts (included), ensuring precise pulley alignment.
  • Tailored Lens Ring Gear: Fits snugly over the factory rubber focusing ring of the Samyang 135 without causing surface damage.
  • Full Software Automation: Works natively with autofocus routines inside ASIAIR, N.I.N.A., SGP, Voyager, or Ekos/KStars.

"Shooting at f/2 with the Samyang 135mm means even a minor 1–2°C ambient shift will swell your star profiles. Pairing this Carbon PETG kit with the ZWO EAF lets you automate refocusing every hour or after filter changes, ensuring pin-sharp stars across your entire night sequence."

— Vincent, Founder of Azur3dprint

Package Contents & Specifications

  • Lens Compatibility: Samyang 135mm F/2.0 ED UMC and Rokinon 135mm F/2.0.
  • Mount Interface: Specifically designed for Azur3dprint Samyang 135 tube rings.
  • Motor Compatibility: ZWO EAF (Standard 5mm shaft or new EAF-N / EAF Pro narrow shaft).
  • Polymer Matrix: High-density Carbon-Fiber reinforced PETG.
  • Drive Components: 1x GT2 pulley (matched bore) + 1x custom closed-loop GT2 timing belt.
  • Focus Gear Ring: 1x slip-fit ring gear tailored for the Samyang 135 rubber ring.
  • Hardware Included: 4x M4x8 mm A2 marine-grade stainless steel screws.
REF039

Data sheet

Contient
1 bague crantée GT2
1 courroie GT2 fermée
1 poulie GT2
4 vis inox M4x8
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