William Optics M48 to M42 Adapter

The William Optics M48 to M42 Adapter converts an M48-threaded astronomy accessory connection to M42. It is designed for astrophotographers who need a simple mechanical thread adapter when building or spacing a telescope imaging train.

Who Is This Product Best For?

This adapter is best for astrophotographers who need to connect M48-threaded accessories to M42-threaded camera adapters, spacers, or imaging accessories.

Why Choose This Product?

• M48 to M42 conversion: Helps connect common astronomy imaging thread standards.
• Mechanical adapter: Simple, compact solution for camera train compatibility.
• Useful for spacing: Helps complete imaging trains where thread standards do not match.

Recommended Uses

• Astrophotography accessory connection
• M48-to-M42 thread conversion
• Telescope camera train setup
• Backfocus and spacing configurations

Compatibility and Accessory Notes

Confirm thread gender, required optical spacing, and total backfocus before using this adapter in an imaging train.

Important Limitations

This is a mechanical thread adapter only. It does not provide optical correction, spacing by itself beyond its physical thickness, or electronic communication.

Our Recommendation

Choose this adapter when you need to bridge M48 and M42 threaded astronomy imaging accessories.