Camera lens hard filters are primarily used to improve the quality of the captured image by reducing glare, enhancing contrast, and correcting color balance.

Polarizing filters are specifically designed to reduce glare and reflections by selectively blocking light waves based on their polarization.

Neutral density filters are used to reduce the amount of light entering the lens, allowing photographers to use slower shutter speeds or wider apertures in bright conditions.

Color correction filters are specifically designed to adjust the color balance in images by selectively transmitting or absorbing specific wavelengths of light.

Ultraviolet filters are primarily used to block ultraviolet light from reaching the camera's sensor, which can cause unwanted haze and bluish casts in images.

Graduated neutral density filters are designed to create a gradual transition from a dark to a light area in an image, often used in landscape photography to balance the exposure between the sky and the foreground.

Hard filters generally provide better image quality compared to soft filters due to their ability to maintain sharpness and reduce unwanted artifacts.

Starburst filters are specifically designed to create a starburst effect in images by diffracting light around bright points, often used in landscape and cityscape photography.

Close-up filters are designed to allow photographers to focus on subjects that are very close to the lens, enabling macro photography.

Diffusion filters are used to soften the overall image, reduce the appearance of skin blemishes and wrinkles, and create a dreamy or ethereal effect.

Haze filters are designed to reduce the appearance of haze and improve clarity in images, especially in distant landscapes or scenes with atmospheric conditions.

Vignette filters are specifically designed to create a vignette effect in images, gradually darkening the edges of the frame while keeping the center bright.

Fog filters are used to create a soft, diffused effect in images, often used in landscape photography to simulate the appearance of fog or mist.

Anti-reflection filters are specifically designed to reduce the appearance of reflections in glass or water surfaces, allowing photographers to capture clear images through these surfaces.

Warming filters are used to add warmth and reduce blue casts in images, often used in landscape photography to create a more inviting and natural look.