# K&F 49mm Variable Neutral Density Filter (ND2–ND2000) Fader Gray, Nano-C KF01.2439

**URL:** https://aio.lv/en/product--kf-sb8235--11878570
**Data updated:** 2026-03-09 20:44 (EET)
**Category:** Camera Filters
**Manufacturer:** K&F
**Manufacturer code:** SB8235
**EAN:** 5904647819122
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 30.99 €
**Prices and availability valid until:** 2026-07-26 23:59
**Price without VAT (21%):** 25.61 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--kf-sb8235--11878570

## 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

Variable neutral density (ND) filter for 49 mm lenses by K&F, model KF01.2439 (MPN SB8235). Adjustable from ND2 to ND2000, this Fader gray Nano-C coated filter reduces light intake to control exposure, allow slower shutter speeds, and widen apertures in bright conditions. Useful for long exposure photography, motion blur effects, and video exposure control while maintaining color fidelity.

## Long description

The K&F 49mm Variable Neutral Density Filter (ND2–ND2000) Fader Gray, Nano-C KF01.2439 is a threaded optical accessory designed for cameras with 49 mm filter threads. It provides continuous light reduction across a wide range, enabling control over exposure without changing aperture or ISO. The Nano-C coating minimizes reflections and maintains color balance while the variable density mechanism allows gradual adjustment from light to very strong attenuation, suitable for stills and video work where precise light control is required.
Advantages
This K&F variable ND filter delivers flexible exposure control by offering a continuous ND range from ND2 to ND2000, so photographers and videographers can fine-tune light intake without swapping multiple fixed filters. The Nano-C coating reduces surface reflections and helps preserve accurate color rendition. The compact 49 mm threaded design is lightweight and compatible with lenses that accept 49 mm filters, making it easy to mount, rotate, and use for creative effects such as motion blur and long exposures. Its stepless adjustment supports smooth transitions during filming and allows using wider apertures in bright conditions.
Suitable for
Long exposure landscape and seascape photography
Motion blur effects for waterfalls, rivers, and traffic
Video work requiring smooth exposure changes and shallow depth of field
Outdoor portraiture in bright light when wider apertures are desired
Time-lapse sequences needing controlled exposure across frames
Key specifications
Filter type: Variable Neutral Density (stepless)
Optical density range: ND2 to ND2000 (approx. 1 to 11 stops attenuation range)
Thread size: 49 mm
Surface treatment: Nano multi-coating to reduce reflections and maintain color fidelity
Mount: Threaded ring compatible with standard 49 mm filter threads
Construction: Thin, low-profile frame for reduced vignetting on wide-angle lenses
How to use
Attach the K&F 49mm variable ND filter to the front of a lens with a matching 49 mm thread and confirm a secure fit. Rotate the outer ring to adjust the density progressively until the desired exposure level, motion blur, or depth of field is achieved. When composing for long exposures, use a tripod and a remote shutter release or camera timer to avoid camera shake. For video, make slow, deliberate adjustments to the filter ring to ensure smooth exposure transitions. Verify color balance in test shots and adjust white balance if necessary.
Usage recommendations
To minimize cross-polarization or X-pattern artifacts at extreme settings, avoid combining the filter at maximum density with other filters or extreme wide-angle focal lengths; instead, use moderate density settings when possible and check results on the camera preview. Clean the glass with a microfiber cloth and lens-safe cleaner before use to maintain image quality. Store the filter in its protective case when not in use to prevent scratches and dust accumulation.

## FAQ

### How much does the K&F 49mm Variable ND Filter KF01.2439 cost, and is it available for purchase?

The price is 30.99 € (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/11878570/67296065_large.webp