M12 Lens Set, Arducam Lens for Raspberry Pi Camera (1/4") and Arduino, Telephoto, Macro, Wide Angle, Fisheye Lens Kit (10°- 200°) with M12 Lens Holder and Cleaning Cloth, Optical All-in-One

Note:

1.Choose a suitable lens holder as follows:

a) Determine the lens holder height listed in the lens specifications for your selected lens. If you use a different lens holder height, you might not be able to focus the lens at all.

b) Ensure that the lens holder matches the screw hole pitch of your camera board. Lens holders are available with18mm and 20mm pitches.

2.If required, the thread gap between the lens and lens holder can be filled with damping grease or similar glue in order to fix the lens in position after focusing.

3.Specks of dust or tiny bubblers might be visible on the image while focusing the lens. These will disappear when the lens is in focus, and will not affect image quality.

4.When focusing or replacing a lens, do not screw the lens into the lens holder too deep, otherwise the lens might touch and damage the image sensor. Often, focusing a lens is performed while monitoring the image quality on a video screen. A blurry image will result if the lens is screwed in either too deep or too shallow from where it is in focus.

5.You have to manually remove the IR filter at the bottom of the lenses when using them with a NoIR camera