K&F CONCEPT Slim Variable ND Filter - 55mm

A variable ND (Neutral Density) filter allows you to adjust the amount of light entering your lens, similar to sunglasses for your camera. It's useful for shooting in bright conditions or for achieving effects like motion blur.

Look for the 'Ø' symbol followed by '55' on your camera lens or under the lens cap. This indicates the lens has a 55mm filter thread.

This filter offers adjustable light reduction from ND2 (1 f-stop) to ND400 (9 f-stops).

Yes, the slim frame design is intended to minimize vignetting, making it suitable for many wide-angle lenses. However, extreme wide-angle lenses might still experience some corner darkening at certain focal lengths.

Rotate the outer ring of the filter. The filter's density will change as you turn the ring.

Optical glass filters, like this one, offer superior clarity, color accuracy, and durability compared to filters made from optical resin.

Use the included microfiber cloth for regular cleaning. For tougher smudges, a lens cleaning solution on the cloth can be used sparingly, followed by drying with a clean part of the cloth.

This is known as cross-polarization and occurs at higher ND settings. Rotate the filter ring to find a neutral position or reduce the ND level. Ensure the filter is properly aligned with your lens's polarization.

Verify that you have selected the correct filter size (55mm for this product). Ensure there are no obstructions or cross-threading on the lens or filter mount.

This can sometimes occur at the extreme ends of the ND range. Try adjusting the filter to a slightly lower ND setting. Post-processing in editing software can also correct minor color casts.

While designed to be slim, vignetting can still occur on very wide-angle lenses. Try zooming in slightly if possible, or reduce the ND level if it persists. Ensure the filter is fully seated.