The FlatCam is a camera designed to be thin and portable, and as such, it does not have a built-in lens. This means that you will need to attach a lens to the camera in order to take pictures. There are a variety of lenses available for the FlatCam, so you can choose the one that best suits your needs.

Some of the benefits of using a FlatCam with a lens include:

* Increased image quality: A good lens can significantly improve the image quality of your photos. This is because lenses can correct for optical aberrations, such as distortion and chromatic aberration. They can also help to improve sharpness and contrast.

* More creative control: A lens can give you more creative control over your photography. For example, you can use a wide-angle lens to capture more of the scene in your photos, or a telephoto lens to bring distant subjects closer. You can also use different lenses to create different effects, such as bokeh (the blurry background in a photo) or shallow depth of field (where only a small part of the photo is in focus).

* Portability: The FlatCam is already very portable, but adding a lens doesn't add much bulk. This makes it easy to take your camera with you wherever you go.

If you are looking for a thin and portable camera that takes great photos, the FlatCam is a great option. Just be sure to choose a lens that best suits your needs.