FLIR T4xx series User Manual page 41

15 Handling the camera
2. Rotate the lens cap 30° counter-clockwise (looking at the front of the lens).
3. Carefully pull out the lens cap from the bayonet ring.
4. Correctly position the lens in front of the bayonet ring.
5. Carefully push the lens into position.
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#T559772; r.7877/7877; en-US