Focus Adjustment Tutorial for the Stock Lens of HUSKYLENS 2

During recent use of HUSKYLENS 2, we found that the pre-installed camera module is not designed with a completely fixed focus. A small amount of solid glue is applied at the bottom of the lens to secure it. By carefully removing the glue fixation with proper tools, the lens focus can be adjusted within a certain range.

For some indoor applications, or scenarios that require close-range scanning or close-range recognition, adjusting the focus properly can help achieve clearer image quality.

However, please note that DFRobot uses solid glue to secure the lens mainly for safety and reliability considerations. Once the fixation is removed, the lens may become loose or detach due to improper operation during adjustment. For example, continuously rotating the lens outward may cause the lens assembly to completely separate, which could result in lens damage from impact or expose the CMOS sensor to dust, seriously affecting image quality.

Therefore, if your application does not require focus adjustment, it is recommended not to remove the lens fixation.

If adjustment is required, please pay attention to the following:

Do not rotate the lens excessively outward, as this may cause the lens to detach completely.
Do not rotate the lens excessively inward, as this may cause the lens to press against the CMOS sensor and damage the sensor or lens.
If the lens accidentally detaches, reinstall it as soon as possible to minimize the time that the CMOS sensor is exposed to air and reduce the risk of dust contamination.

Any damage to the camera module, dust contamination on the CMOS sensor, or other issues caused by user adjustments will not be covered under the camera module warranty. Please proceed carefully based on your actual needs.

1. Tool Preparation

Needle-nose pliers × 2 (small size preferred)

2. Loosen the Lens

Remove the lens from HUSKYLENS 2 and inspect it from the side.You will see the lens consists of two parts: the base inside the red frame and the focus ring within the blue frame.

Clamp these two parts separately with the two needle-nose pliers.

Hold the base firmly with one needle-nose plier, then twist the focus ring toward the lens using the other plier. Only loosen it slightly to break the glue bond.

Caution: Do not clamp the circuit board with the plier holding the base, otherwise the entire base may twist off and damage the lens.