M12 Lens Set for USB Camera(1/2.7 1/2.8 1/2.9), Telephoto, Macro, Wide Angle, Fisheye Lens Kit (20°- 180°) with Holder and Cleaning Cloth, Optical All-in-One

Product description In order to meet the increasing market demands for more lens options to address different use cases, Arducam selected and tested a wide range of M12 mount optimal lenses from long focus to fisheye for shooting on your USB cameras. Its now much easier for you to get the best lens youll need, and we will keep the lens list growing in the near future. 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 on 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 on 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 l