Some uEye models feature an adjusting ring that allows changing the flange back distance. Please follow the information below to avoid damage to the camera.
USB uEye LE with fix filter glass (production until April 2009)
The adjusting ring of the USB uEye LE has 10 adjusting positions. For each adjusting position, the flange back distance is altered by +/- 50 µm.

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To change the position of the adjusting ring, please proceed exactly in the following order:
1. | Loosen the locking screw (see figure below). |
3. | Hold the CS-mount ring and screw in the locking screw. Do not use excessive force. |
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 Figure 297: USB uEye LE with fix filter glass
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 Figure 298: USB uEye LE - Locking screw for the adjusting ring
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USB uEye LE with inserted filter glass (production since May 2009)
The adjusting ring of the USB uEye LE has 10 adjusting positions. For each adjusting position, the flange back distance is altered by +/- 50 µm.

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To change the position of the adjusting ring, please proceed exactly in the following order:
1. | Loosen the locking screw on the bottom of the camera (see illustration below). |
2. | Release the filter holder by turning it two revolutions counterclockwise (IDS special tool required, see also USB uEye LE Accessories). |
3. | Adjust the CS-mount ring. Ensure that the notch of the CS-mount ring is precisely aligned with the locking screw (when viewed from the camera front). |
4. | Hold the CS-mount ring and screw in the locking screw. Do not use excessive force. |
5. | Turn the filter holder clockwise until tight. |
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 Figure 299: USB uEye LE with inserted filter glass
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 Figure 300: USB uEye LE - Locking screw for the adjusting ring
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GigE uEye HE
The adjusting ring of the GigE uEye HE camera has 10 adjusting positions. For each adjusting position, the flange back distance is altered by +/- 50 µm.

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To change the position of the adjusting ring, please proceed exactly in the following order:
1. | Loosen the locking screw on the bottom of the camera (see illustration below). |
2. | Release the filter holder by turning it two revolutions counterclockwise (IDS special tool required, see also GigE uEye HE Accessories). |
3. | Adjust the C-mount ring. Ensure that the notch of the C-mount ring is precisely aligned with the locking screw (when viewed from the camera front). |
4. | Hold the C-mount ring and screw in the locking screw. Do not use excessive force. |
5. | Turn the filter holder clockwise until tight. |
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 Figure 301: GigE uEye HE - Locking screw for the adjusting ring
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Drawing of the uEye adjusting ring
 Figure 302: uEye flange adjusting ring (top view)
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 Figure 303: uEye flange adjusting ring (bottom view)
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 Figure 304: Rotation angle of adjusment ring
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