# K&F 37mm 3-in-1 Hybrid Filter: ND2–32 Variable (Fader) + CPL + Black Diffusion 1/4

**URL:** https://aio.lv/en/product--kf-sb10090--11878730
**Data updated:** 2026-03-09 20:44 (EET)
**Category:** Camera Filters
**Manufacturer:** K&F
**Manufacturer code:** SB10090
**EAN:** 6942052562041
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 48.99 €
**Prices and availability valid until:** 2026-07-29 23:59
**Price without VAT (21%):** 40.49 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--kf-sb10090--11878730

## 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

Hybrid 3-in-1 lens filter for 37mm thread cameras by K&F combining a variable ND filter (Fader) with range ND2–32, a circular polarizer (CPL) and a Black Diffusion 1/4 filter. Designed to reduce light intake, control reflections and soften highlights for video and photography. Suited for exposure control, long exposures, landscape, portrait and cinematic capture.

## Long description

The K&F 37mm 3-in-1 Hybrid Filter combines a variable neutral density (Fader) with a circular polarizer (CPL) and a Black Diffusion 1/4 element in a single 37mm-threaded filter. The Fader offers a continuous ND range equivalent to ND2–ND32, allowing controlled reduction of incoming light for slower shutter speeds or wider apertures. The integrated CPL reduces surface reflections and increases color saturation, while the Black Diffusion 1/4 softens highlights and reduces contrast for a gentle cinematic look. The compact, all-in-one design fits lenses with a 37mm front thread and eliminates the need to stack multiple separate filters for common exposure and creative effects.
Advantages
The hybrid construction saves time and space by combining exposure control, polarization and diffusion in a single 37mm filter, reducing vignetting risks on small-diameter lenses. The variable ND section provides smooth, stepless adjustment across the ND2–ND32 range for flexible shutter speed and aperture control in changing light conditions. The CPL component improves sky contrast and minimizes unwanted reflections from water and glass while maintaining color fidelity. The Black Diffusion 1/4 subtly reduces highlight harshness and produces a softer, film-like rendering useful for both stills and video. Durable frame construction supports repeated mounting and removal without tools.
Suitable for
Landscape photography with exposure and reflection control
Long-exposure and motion-blur effects in daylight
Portraits and close-ups where softer highlights are desired
Video and cinematic capture requiring controlled exposure and reduced contrast
Compact camera setups where lens diameter is 37mm
Key specifications
Thread size: 37mm compatible with lenses featuring a 37mm front thread
Variable ND range: ND2 to ND32 (stepless adjustment)
Polarizer type: circular polarizer (CPL)
Diffusion strength: Black Diffusion 1/4 for subtle softening of highlights
Combined multi-element design: integrated ND, CPL and diffusion layers in one filter
How to use
Mount the filter on any lens with a 37mm front thread. Rotate the outer ring to adjust the variable ND (Fader) to the desired light reduction for longer exposures or wider apertures. Rotate the CPL element independently to orient the polarizing effect and reduce reflections or increase sky contrast; view changes through the viewfinder or live view while turning. The diffusion layer is built into the filter and requires no separate adjustment; use it when you want softened highlights and reduced contrast. Check for unwanted vignetting at wide focal lengths and adjust framing or aperture as needed.
Usage recommendations
For best results, set exposure and composition before fine-tuning the ND and CPL rings. When using strong ND settings, use a tripod for long exposures and enable mirror lock-up or electronic shutter where available to minimize camera shake. Clean the filter with a microfiber cloth to preserve optical quality and avoid abrasive cleaners. Combine modest diffusion with lower ISO settings to maintain image detail while achieving the desired softened look.

## FAQ

### How much does the K&F 37mm 3-in-1 Hybrid Filter ND2–32 CPL Diffusion cost, and is it available for purchase?

The price is 48.99 € (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/11878730/67296268_large.webp