Knurled Collimation Thumbscrews M4 (35mm) — Set of 3
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  • Knurled Collimation Thumbscrews M4 (35mm) — Set of 3
  • Knurled Collimation Thumbscrews M4 (35mm) — Set of 3
  • Knurled Collimation Thumbscrews M4 (35mm) — Set of 3

Knurled Collimation Thumbscrews M4 (35mm) — Set of 3

€9.50
Tax included

Say goodbye to Allen wrenches in the dark. Adjust your Newtonian secondary mirror by hand with absolute safety and ease.

  • 🎯 Tool-Free Adjustments: Ergonomic knurled heads allow smooth adjustments, even with gloves on.
  • 🛠️ Premium Hardware: 35mm long M4 threads made of rust-proof marine-grade stainless steel.
  • 🎨 Style & Visibility: Custom colored finish to personalize your telescope and easily find your knobs in pitch black.
  • 🔭 Wide Compatibility: Direct replacement for most major Newtonians (Sky-Watcher, GSO, TS-Optics).
couleur / Color: Green
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Knurled Collimation Screws M4 (35mm) — Set of 3

High-performance, wallet-friendly toolless knobs for Newtonian telescopes

Every astrophotographer or visual observer knows that spot-on collimation is the secret to pinpoint stars and high-contrast details. Yet, messing with hex keys or screwdrivers near your optics in pitch black is always stressful. Our premium knurled collimation thumbscrews eliminate that anxiety, delivering effortless, manual adjustment without breaking the bank.

⚙️ Marine-Grade Stainless Steel

Forget cheap factory screws that strip or rust due to heavy night dew. Machined from premium stainless steel, these M4 x 35mm screws run perfectly smooth. The oversized knurled knobs give you excellent grip confidence, even during freezing winter sessions.

🌈 Custom Style & Night Visibility

Offered in various distinct colors (Red, Green), these knobs give your spider a unique personalized look. Beyond aesthetics, this high-contrast color finish makes it incredibly easy to spot and grab your adjustment knobs in the dark, saving you time in the field.

Universal Telescope Fit

This 3-piece upgrade kit is tailored to seamlessly replace stock secondary mirror screws on a wide variety of Newtonian reflectors, including:
• Sky-Watcher (Black Diamond, Quattro, 150P, 200P, 250P, 300P, etc.)
• GSO / Apertura reflectors
• TS-Optics (UNC & Photon series)
• Telescope Service imaging scopes

💡 The Astronomer's Advice: "Collimation shouldn't feel like a chore or a hazard. I selected this 35mm length to ensure great finger clearance on the secondary housing. For a safe install, replace the factory screws one by one. Swap one out, spin the new Azur3dprint knob in, then move to the next. This keeps your secondary mirror holder perfectly supported throughout the upgrade."

— Vincent, Founder of Azur3dprint

Technical Specifications & Box Contents

  • Thread Pattern: M4 (Standard Newtonian secondary housing).
  • Thread Length: 35 mm.
  • Material: Heavy-duty, weather-resistant Stainless Steel.
  • Package Includes: Set of 3 collimation thumbscrews (color selected via options).
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