Filters CPL and UV specifically for the Sigma 10-20mm f/3.5 EX DC HSM lens:

Details about the Filters:

CPL Filter (Circular Polarizing Filter):

Function:

Reduces reflections and glare from non-metallic surfaces like water and glass.

Enhances colors and contrast, especially in blue skies and green foliage.

Usage:

Useful in landscape photography to deepen the color of the sky and reduce reflections in water.

Helps in achieving a more saturated and vivid image.

UV Filter (Ultraviolet Filter):

Function:

Blocks ultraviolet light, which can cause haziness and reduce contrast in outdoor photos.

Primarily used to protect the front element of the lens from dust, dirt, and scratches.

Usage:

Often left on the lens at all times for protection.

Does not significantly affect exposure or color balance.

Advantages of Higher-Quality Filters Made in Japan:

Optical Quality: Japanese-made filters are often known for their superior optical glass, ensuring minimal impact on image quality.

Coatings: Higher-quality filters typically have multiple coatings to reduce lens flare, ghosting, and reflections.

Durability: These filters are usually more durable and resistant to scratches, making them a good investment for protecting expensive lenses.

Price:

300 NOK (Norwegian Krone): Approximately equivalent to 30 USD or 25 EUR (exchange rates may vary).

Including these high-quality Japanese-made CPL and UV filters for an additional 300 NOK can be a good deal, as they can enhance image quality and protect your lens while offering better performance and durability compared to cheaper alternatives.