4 Inch Lens Kit MIRA

Updated November 12, 2026

Applies to: MIRA 5, MIRA 7 and MIRA 9

This guide shows how to swap the standard lens on your MIRA for the 4 inch lens kit. With the kit installed the machine can no longer autofocus, so you set the focal distance by hand with the focus gauge.

What you need

  • 4 inch lens kit
  • 2.5 mm Allen key
  • 20.5 mm manual focus gauge
  • A cloth or board to catch loose bolts

Video

Steps

  1. Place a cloth or board under the laser head, resting on the blades. It will catch any bolts that fall.

  2. Using a 2.5 mm Allen key, remove the two bolts holding the autofocus assembly to the laser head, and let the assembly hang out of the way.

    2.5 mm Allen key removing the autofocus assembly bolts from the MIRA laser head
    Remove the two bolts with a 2.5 mm Allen key.
  3. Slide out the lens holder cartridge and store it somewhere safe.

    Lens holder cartridge, Allen key and two bolts resting on a cloth
    Lens holder cartridge, Allen key and the two bolts on a cloth.
  4. Unscrew the stock nosecone from the bottom of the laser head.

    Stock nosecone on the left and extended nosecone on the right
    Stock nosecone (left) and extended nosecone (right).
  5. Install the extended nosecone from the 4 inch lens kit. Take care not to overtighten it.

  6. Install the lens holder cartridge that comes with the kit. Its 4 inch lens is already fitted.

    Extended nosecone and lens holder cartridge with a pre-installed 4 inch lens
    Extended nosecone and the lens holder cartridge with its pre-installed 4 inch lens.
  7. Reinstall the autofocus assembly with the 2.5 mm Allen key, taking care not to overtighten the bolts. Route the cable safely out of the laser path.

    Autofocus assembly reinstalled on the MIRA laser head
    Autofocus assembly, reinstalled.

Caution: Do not autofocus the machine with the 4 inch lens kit installed. Use a focus gauge to set the focal distance to the material by hand.

Photo accompanying the manual focus caution for the 4 inch lens kit

Need a hand?

Email support@aeonlaser.us or call 321-260-2325. More ways to reach us are on the Support page.

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