Use A Lens Hood (Optional) - Samsung 20-50 mm F3.5-5.6 ED II User Manual

Use a lens hood (optional)
To prevent deterioration of image quality due to internal reflection of light, use a lens
hood. A lens hood is an optional item that is available only for the Samsung 20 mm F2.8
lens.
Install the lens hood as shown in the picture below.
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'Mlen installing the lens hood, be careful not to rotate the focus ring •.
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