# K&F Filter Kit 4-in-1 (Nano-K) 40.5 mm — UV, CPL, ND4, Protective

**URL:** https://aio.lv/en/product--kf-sb7484--11878402
**Data updated:** 2026-03-09 20:43 (EET)
**Category:** Camera Filters
**Manufacturer:** K&F
**Manufacturer code:** SB7484
**EAN:** 5904647814837
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 40.99 €
**Prices and availability valid until:** 2026-07-28 23:59
**Price without VAT (21%):** 33.88 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--kf-sb7484--11878402

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 14.07.2026 | free |
| Pickup points | 17.07.2026 | 1.89 EUR |
| Courier delivery to door | 17.07.2026 | 4.99 EUR |

## Summary description

K&F 4-in-1 filter kit (Nano-k) for 40.5 mm lenses includes UV, circular polarizer (CPL), ND4 neutral density and a protective filter. Designed to fit lenses with 40.5 mm filter thread, the set provides glare reduction, color saturation control, light reduction for longer exposures, and basic front-element protection for general photography and outdoor use.

## Long description

The K&F Filter Kit 4-in-1 (Nano-K) 40.5 mm includes four screw-in filters sized for lenses with a 40.5 mm filter thread: a UV filter, a circular polarizer (CPL), an ND4 neutral density filter and a clear protective filter. These filters are designed to reduce surface ultraviolet haze, cut reflections and glare, control light entering the lens for longer exposures, and shield the front element from dust, moisture and minor impacts. The Nano-K coating improves optical transmission and helps resist fingerprints and smudges while maintaining color neutrality for general photography and outdoor shooting.
Advantages
The kit offers broad practical coverage in a compact set: UV filtration for reducing atmospheric haze and protecting the front element, a CPL for managing reflections and increasing color saturation, an ND4 for reducing exposure by two stops to enable slower shutter speeds or wider apertures, and a protective clear filter for everyday lens protection. Each filter is screw-mounted for secure attachment and straightforward use. Nano-K surface treatments improve cleaning and reduce ghosting and flare without introducing visible color cast.
Suitable for
Landscape and travel photography where haze reduction and polarity control are needed
Outdoor portrait and product shots requiring reduced reflections and richer colors
Long-exposure daytime photography using ND4 to slow shutter speeds
Everyday lens protection during transport and fieldwork
Key specifications
Filter thread size: 40.5 mm
Included filters: UV, Circular Polarizer (CPL), ND4 (2-stop neutral density), Protective/Clear
Coating: Nano-K anti-reflective and easy-clean coating
Mount type: screw-in metal or alloy ring (low-profile)
Optical effect: ultraviolet reduction, polarization for glare control, 2-stop light reduction, front-element protection
How to use
Screw the appropriate filter onto the front of a lens with a 40.5 mm filter thread. Use the UV filter by default to reduce haze and provide continuous front-element protection. Rotate the CPL while viewing through the viewfinder or live view to find the angle that reduces reflections and increases color saturation; fine adjustment is possible by turning the outer ring of the CPL. Attach the ND4 when you need to reduce exposure by approximately two stops for motion blur or wider-aperture effects in brighter conditions. Remove filters or swap them as shooting conditions change; always store filters in their protective case when not in use to avoid scratches.
Usage recommendations
For best results, keep threads clean and avoid overtightening. When using the CPL with wide-angle lenses, check for uneven polarization across the frame. Combine the ND4 with a tripod for stable long-exposure shots and use lens hood where possible to reduce stray light. Clean the Nano-K coated surfaces with a blower, microfiber cloth and approved lens cleaner to maintain optical performance.

## FAQ

### How much does the K&F Filter Kit 4-in-1 Nano-k 40.5 mm cost, and is it available for purchase?

The price is 40.99 € (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 14.07.2026 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/11878402/67295841_large.webp