You can adjust the focus on these cameras. You'll need to remove the shade and unscrew the front cover. Then you'll need to remove the IR led assembly (2 screws) and loosen a screw on the lens socket to adjust the lens. See here: http://www.ipcam-shop.nl/media/download/FI8904 change lens_EN.pdf
Also if you go here to youtube to see a F18094W disassembled:
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Also if you go here to youtube to see a F18094W disassembled:
Hope this helps.