Making A Refractor Telescope Norman Remer Pdf 12 New -

Write-up: Making a Refractor Telescope — Inspired by Norman Remer (PDF, 12-inch New)

3. Materials & Components (suggested)

• Objective lens: Custom 12" achromatic doublet or ED doublet from a reputable optical fabricator.
• Tube: Carbon-fiber composite (light, stiff, low thermal expansion) or aluminum (cheaper, easy to machine).
• Lens cell: CNC-machined aluminum or stainless steel with nylon/silicone pads.
• Focuser: Large 3–4" Crayford or rack-and-pinion with microfocuser; travel ~100–150 mm.
• Diagonal: 2" dielectric mirror or prism for visual; 2" camera adapter for imaging.
• Mount: Pier/drive rated for >150–200 kg (including counterweights), precise tracking with autoguider interface.
• Accessories: Dew heater, slip-resistant cradle rings, altitude/azimuth adjusters for collimation.

Who should avoid it:

• Beginners looking for a “first telescope project” (start with a Newtonian reflector).
• People without access to a lathe, drill press, or basic machining tools.
• Those expecting step-by-step plans for a simple PVC-pipe scope.

6. Thermal & Practical Considerations

• Thermal equalization: A 12" lens needs time (often 1–3 hours) to reach ambient to minimize tube currents; consider passive vents or a low-speed fan for forced cooling.
• Support for heavy optics: Ensure mount and pier are stiff; resonance damping with viscoelastic pads.
• Handling and transport: Use a sling or padded transport case; the objective lens must be protected from shock and moisture.

📄 About the “12 New” PDF request

If you’ve seen a file named something like Remer_Refractor_12_new.pdf, it’s likely:

• A 12-page preview (e.g., from Google Books or a publisher sample).
• A 12-step summary made by an amateur.
• A mislabeled scan of another ATM article (maybe from Sky & Telescope or ATM Journal).

No legitimate “12 new edition” exists. The only edition is the 1995 Willmann-Bell printing. making a refractor telescope norman remer pdf 12 new