# K&F Adjustable Neutral Density Filter 55mm ND2–ND400, Variable Grey (SB7149)

**URL:** https://aio.lv/en/product--kf-sb7149--11878803
**Data updated:** 2026-03-09 20:44 (EET)
**Category:** Camera Filters
**Manufacturer:** K&F
**Manufacturer code:** SB7149
**EAN:** 6975219854383
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 31.99 €
**Prices and availability valid until:** 2026-07-26 23:59
**Price without VAT (21%):** 26.44 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--kf-sb7149--11878803

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 13.07.2026 | free |
| Pickup points | 16.07.2026 | 1.89 EUR |
| Courier delivery to door | 16.07.2026 | 4.99 EUR |

## Summary description

Adjustable neutral density (variable ND) filter for 55mm lenses by K&F, model SB7149. Provides continuous light reduction from approximately ND2 to ND400 to control exposure and enable longer shutter speeds or wider apertures in bright conditions. Suited for landscape, long-exposure, and motion-blur photography; screws onto 55mm filter threads and offers practical exposure control without changing aperture or ISO.

## Long description

The K&F Adjustable Neutral Density Filter 55mm ND2–ND400 (Variable Grey) is a variable ND filter designed for lenses with a 55mm filter thread. It provides continuous light reduction across a wide range, allowing photographers to control exposure without changing aperture or ISO. The filter is intended for situations where longer shutter speeds or wider apertures are required in bright conditions, such as landscape and long-exposure photography. It screws onto standard 55mm filter threads and offers a single, adjustable solution instead of carrying multiple fixed-density filters.
Advantages
This variable neutral density filter delivers a broad adjustable range from approximately ND2 to ND400, enabling fine control of light transmission. It reduces the need to swap multiple filters by offering continuous adjustment in one compact accessory. The screw-in design fits 55mm lenses directly, preserving lens handling and balance. By allowing slower shutter speeds or larger apertures in bright light, it supports creative effects such as smooth water motion, cloud blur, and isolated subjects with shallow depth of field while maintaining consistent image quality when used correctly.
Suitable for
Landscape photography requiring long exposures in daylight
Long-exposure and motion-blur effects for water, clouds, and traffic
Portraits in bright light when a wider aperture is desired
Outdoor videography needing controlled exposure without changing camera settings
Key specifications
Filter type: adjustable (variable) neutral density
Thread diameter: 55 mm (screw-in)
Density range: approximately ND2 to ND400 (continuous)
Primary function: adjustable light attenuation for exposure control
How to use
Screw the filter onto the 55mm filter thread of your lens until it is secure but not overtightened. Rotate the outer ring to change density and view the effect in the viewfinder or on the camera monitor while observing exposure indicators. When using very long exposures, mount the camera on a stable tripod and use mirror lock-up or electronic shutter options if available to reduce vibration. Monitor for vignetting at wide angles and adjust composition or remove the filter when not needed. Ensure correct metering by checking the camera’s exposure readout after adjusting the filter density.
Usage recommendations
Use the filter with lenses and camera settings that match its 55mm thread to avoid light leaks or mechanical stress. When working at the extreme end of the density range, check for potential color shifts or X-pattern artifacts and adjust rotation slightly to find the optimal position. Store the filter in a protective case when not in use and clean both sides with a microfibre cloth and appropriate cleaning fluid to maintain image quality.

## FAQ

### How much does the K&F 55mm Adjustable ND Filter SB7149 cost, and is it available for purchase?

The price is 31.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 10 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 13.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All K&F products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized K&F service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/11878803/67296385_large.webp