# Lens Filter K&F Concept HD Black Mist 1/4 40.5mm – softening diffusion filter for 40.5 mm lenses

**URL:** https://aio.lv/en/product--kf-concept-kf011629--5096876
**Data updated:** 2026-02-12 14:18 (EET)
**Category:** Camera Filters
**Manufacturer:** K&F Concept
**Manufacturer code:** KF01.1629
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 56.99 €
**Prices and availability valid until:** 2026-07-26 23:59
**Price without VAT (21%):** 47.10 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--kf-concept-kf011629--5096876

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | Wednesday | free |
| Pickup points | 06.07.2026 | 1.89 EUR |
| Courier delivery to door | 06.07.2026 | 4.99 EUR |

## Summary description

K&F Concept HD Black Mist 1/4 40.5mm is a screw-in diffusion (softening) lens filter for lenses with a 40.5 mm thread. It produces subtle halation and smooths highlights and skin tones to reduce harsh contrast, useful for portrait, fashion and cinematic photography. The HD glass construction preserves image sharpness while adding controlled glow and reducing digital harshness.

## Long description

K&F Concept HD Black Mist 1/4 40.5mm is a screw-in diffusion filter designed for lenses with a 40.5 mm front thread. The filter creates a subtle softening effect by producing controlled halation around highlights and gently smoothing skin tones and specular highlights. Constructed with HD-quality glass, it is intended to reduce digital harshness while preserving image sharpness and color fidelity, making it suitable for portrait, fashion and cinematic photography where a restrained glow and softer contrast are desired.
Advantages
The HD Black Mist 1/4 filter offers a balanced diffusion that softens highlights without significantly degrading overall resolution. Its screw-in design for 40.5 mm lenses ensures secure mounting and easy use on compatible lenses. The HD glass construction minimizes chromatic aberration and maintains color accuracy while imparting a natural-looking glow and reducing contrast in high-light areas. This results in smoother skin rendering and more film-like highlights for both stills and video.
Suitable for
 Portrait photography to smooth skin tones and reduce harsh highlights
 Fashion and editorial shoots requiring controlled glow and softer contrast
 Cinematic and video work where subtle halation enhances the mood
 Studio and location shoots when a restrained diffusion effect is needed
Key specifications
 Filter type: Black Mist (softening diffusion)
 Strength: 1/4 (subtle diffusion)
 Mount type: screw-in filter for 40.5 mm lens thread
 Optics: HD glass construction designed to preserve sharpness and color fidelity
 Effect: controlled halation, highlight smoothing, reduced digital harshness
How to use
Screw the K&F Concept HD Black Mist 1/4 40.5mm onto the front thread of a compatible 40.5 mm lens until it is secure. Compose and focus as usual; exposure settings generally remain similar but check highlights on a histogram or preview to account for the softening effect. For portrait work, position subjects and light sources to benefit from gentle halation around bright highlights. Use the filter with both stills and video; monitor focus carefully because the filter softens highlights but preserves overall sharpness.
Usage recommendations
For a natural result, pair the 1/4 Black Mist strength with controlled lighting—avoid extremely bright point sources close to the lens unless stronger halation is intended. Clean the filter surface with a microfiber cloth before use to prevent artifacts. When stacking with other filters, verify that the combined optical effect and vignetting remain acceptable for the chosen lens and focal length.

## FAQ

### How much does the K&F Concept HD Black Mist 1/4 40.5mm filter cost, and is it available for purchase?

The price is 56.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 2 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 Wednesday 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: Cash payment, 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 Concept 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 Concept 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/5096876/40964324_large.webp