This particular lens has a magnification ratio of 0.21. The aperture on the lens ranges from ƒ/22 to ƒ/5.6.
From WEX Photo Video
Laowa 9mm f5.6 FF RL Lens for Nikon Z
Carmarthen Cameras
Laowa 9mm f5.6 FF RL Lens - Nikon Z
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