When this issue happens, you'll see that, despite being tightened, the lens mount cannot be adjusted to the ideal angle as illustrated in the picture below.

Why It Happens

Cause: The screw thread is faulty. Given the inherent error of the screw threading process, it is natural that, during actual installation, the lens mount can deviate between a range of ±30° without affecting machine performance.

How to Fix It

#1 Tighten with another lens mount

• As 1 set of the Air Assist includes 2 lens mounts (see the picture below), you may use an alternative lens mount for tightening.

#2 Install two sealing rings

1. Retrieve the spare sealing ring (1 set of the Air Assist includes 2 sealing rings).
2. Install two sealing rings on the lens before attaching the lens mount.

#3 Wrap some layers of Teflon tape

• Wrap the thread with some layers of Teflon tape before installation.

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