K&F CONCEPT 55mm Variable ND2-32 Lens Filter Instruction Manual

2.1 Checking Lens Compatibility

Before attaching the filter, ensure your camera lens has a 55mm thread size. This is typically indicated by a "ø" (diameter) symbol followed by a number on the front of your lens barrel or inside the lens cap. This ND filter is specifically designed for 55mm lenses.

Locating the filter thread size on your camera lens, indicated by the "ø" symbol.

2.2 Attaching the Filter

1. Carefully align the filter's threads with the threads on the front of your camera lens.
2. Gently rotate the filter clockwise until it is securely fastened. Avoid overtightening to prevent damage to both the filter and your lens.
3. The filter features CNC precision machining with a non-slip pattern for convenient attachment and removal.

The filter's precision-machined frame ensures a secure fit and easy handling.

3.1 Adjusting Light Reduction (ND Stops)

The K&F CONCEPT Variable ND2-32 filter allows for 1 to 5 stops of light reduction. To adjust the density, rotate the outer ring of the filter. The filter has hard stops at each end of its exposure range (ND2 to ND32) to prevent over-rotation and the common "X" cross effect.

Visual representation of the variable ND settings from ND2 to ND32.

3.2 Creative Applications

• Wider Apertures: In bright conditions, use the filter to reduce light and allow for wider apertures (smaller f-numbers). This helps achieve a shallower depth of field, blurring backgrounds for portrait photography.
• Slower Shutter Speeds: The filter enables slower shutter speeds, which is ideal for capturing motion blur effects in bright environments, such as smoothing water in landscapes or creating light trails.

Example of a landscape photograph utilizing the ND filter for creative effects.

3.3 Official Product Video

4.1 Cleaning the Filter

The K&F CONCEPT ND filter features 18 multi-layer nanometer coatings, which provide excellent protection and reduce reflections. To maintain optimal image quality, keep the filter clean. Use the provided microfiber cleaning cloths or a soft, lint-free cloth specifically designed for optical surfaces.

1. Gently brush off any loose dust or debris using a lens brush or air blower.
2. If smudges or fingerprints are present, lightly breathe on the filter surface to create a small amount of moisture, then gently wipe with a clean microfiber cloth in a circular motion from the center outwards.
3. Avoid using harsh chemicals or abrasive materials, as these can damage the coatings.

Proper cleaning of the filter using a microfiber cloth to maintain its optical integrity.

4.2 Storage

When not in use, store the filter in its protective case to prevent scratches and dust accumulation. The filter comes in vacuum packaging to ensure it arrives clean and protected.

The K&F CONCEPT filter and its protective case, along with a cleaning cloth.

5.1 Avoiding the "X" Cross Effect

Variable ND filters can sometimes exhibit a dark "X" pattern at their maximum density settings. The K&F CONCEPT Variable ND2-32 filter is designed with a frame self-lock mechanism and hard stops to prevent this issue within its 1-5 stop range. If you observe an "X" pattern, ensure the filter is not rotated beyond its marked maximum density (ND32) or minimum density (ND2) limits.

Demonstration of the K&F CONCEPT filter's ability to avoid the "X" cross effect, compared to other variable ND filters.