Panasonic Lumix DMC-GM5KP Service Manual page 10

3.3.3. Lens Unit (Interchangeable Lens: H-X015)
3.3.3.1. About Lens Main Unit (Ref. 308)
1. Lens Main Unit (Ref. 308) is not supplied due to difficulty of the transportation issue (Fragile, Dust-free packing), and requires
critical lens adjustments.
Therefore, any needs of the "Lens Main Unit" (Ref. 308), carefully confirm its performance in advance.
2. Once "Lens Main Unit" (Ref. 308) is confirmed as defective, place order "Lens Unit" (Ref. 300) and replace Shading Frame
(Ref. 304), to maintain Serial number of owner's original lens.
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