42mm thread extension tube for extreme macro.

Modular M42 Macro Extension Tubes – 3D‑Printable Kit for Precision Macro Photography 🔍📷

Overview

This modular set of 3D‑printed macro extension tubes is made for lenses with the classic M42 screw mount (42 mm × 1 mm pitch). By increasing the lens‑to‑sensor distance, the tubes boost magnification for detailed macro work—especially with vintage optics 🪻🔬. Combine them with any DSLR or mirrorless body via a standard M42 adapter and stack to taste.

📏 Tube Lengths Included

🔧 Key Features

• M42 thread (compatible with Helios, Pentacon, Industar, etc.)
• Stackable modular design for precise extension control
• Generous internal diameter to prevent vignetting
• Textured exterior for secure grip
• FDM‑friendly geometry—no supports required

🖨️ Recommended Print Settings

• Material: PLA / PETG (rigid, dimensionally stable)
• Layer height: 0.20 mm
• Infill: 20 – 30 %
• Supports: None ✅
• Orientation: Print vertically for optimal strength

📸 Usage Tips

• Pair with any M42 lens plus an adapter (e.g., Helios 44‑2, Pentacon 50 mm)
• A tripod is strongly advised—depth of field is razor‑thin at high magnification
• Ideal for insects, botanicals, tiny mechanical parts, and texture studies

ℹ️ Why M42?

The M42 screw mount—popularized by brands like Zeiss, Asahi, and Soviet manufacturers—remains a favorite among macro enthusiasts for its purely mechanical design, affordability, and easy adaptation to modern digital cameras.

🙏 Thanks & Stay Connected

Thank you for checking out this project! If you build the tubes or capture something cool with them, I’d love to see it.
Follow me on Instagram @PUNTO91HGT See you there! 🚀