Printable Helicoid Focusing Scale Generator

What is it?

Are you building a custom or 3d-printed camera and use a helicoid for focusing?
This page helps with printing a custom focusing scale based on your lens/helicoid combination.
The default values work well for the common M65 17-31mm helicoid.

📋 How to Use

Enter your lens focal length and helicoid specifications.
In "Major Distances", enter the focus marks you want (in meters, comma-separated).
Adjust the physical "Throw Length", "Scale Height", and "Font Size" for your design.
Preview the live-generated linear scale below.
Print the page at 100% scale (no scaling).
Carefully cut out the scale strip and apply it to your helicoid.

Focal Length (mm): Total Helicoid Extension (mm): Throw Length (mm):

Scale Height (mm): Font Size (px): Major Distances (m, comma-separated):

🖨️ Printing Instructions

Paper: This page is optimized for A4 paper.
Scale: Print at 100% (Actual Size, no scaling).
Quality: Use high quality settings for precise markings.
Validation: After printing, measure the total scale length with a ruler to verify it matches the "Throw Length" you entered.

📏 Printable Helicoid Focusing Scale Generator

What is it?

📋 How to Use

🖨️ Printing Instructions