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

Remove the two bolts with a 2.5 mm Allen key. -
Slide out the lens holder cartridge and store it somewhere safe.

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

Stock nosecone (left) and extended nosecone (right). Install the extended nosecone from the 4 inch lens kit. Take care not to overtighten it.
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Install the lens holder cartridge that comes with the kit. Its 4 inch lens is already fitted.

Extended nosecone and the lens holder cartridge with its pre-installed 4 inch lens. -
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.
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.

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