Hi all,
I'm starting this topic hoping we can find several inetersting high-quality M12 lenses in sub-$20 price range for action cam users who want to improve the image quality or try to find a replacement for the stock lens.

The key features we should consider here are:
I'm starting this topic hoping we can find several inetersting high-quality M12 lenses in sub-$20 price range for action cam users who want to improve the image quality or try to find a replacement for the stock lens.
The key features we should consider here are:
- Price. $20 and below.
- Dimensions. The lens should be as small as possible in order to fit the waterproof case and other accessories.
- Format. Largest possible sensor size without vignetting.
- Optical resolution. Megapixel count.
- F-number. Aperture.
- Horizontal FOV. Field of view.
- Distortion.
- Additional details (IR-cut filter, CRA etc).
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