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Tiffen 405F3 40.5mm Fog 3 Filter Lens — main product image
Tiffen

Tiffen 405F3 40.5mm Fog 3 Filter Lens

★★★★★4.8 (4 reviews)

Add a soft, atmospheric fog effect to your images with this 40.5mm Tiffen Fog 3 filter using ColorCore technology.

$64.99*
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*Price sourced from Amazon.com. Last updated:Jul 14, 2026.Price and availability are subject to change.

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Overview

The Tiffen 40.5mm Fog 3 Filter is a creative lens filter designed to simulate the look of natural fog in your photographs and video. By dramatically lowering contrast and adding a soft, glowing quality to highlights, the filter creates an ethereal, dreamlike atmosphere that is difficult to replicate convincingly in post-processing. The "3" density rating places this filter on the stronger end of Tiffen's fog range, producing a clearly visible effect that softens the overall mood of a scene while still retaining underlying sharpness in the subject.

Built with Tiffen's ColorCore technology, the fog effect is embedded within the glass itself rather than applied as a surface coating. This means the filtration is uniform across the entire frame, with no hot spots or uneven diffusion. The 40.5mm thread size makes it a fit for various compact, mirrorless, and smaller-format lenses. For filmmakers and photographers working in genres like portraiture, wedding photography, and cinematic storytelling, the Fog 3 filter offers a practical way to achieve a polished, in-camera look without relying on software filters after the fact.

Key Features

Creates a Fog-Like Effect to Image

Maintains Sharpness and Minimizes Flare

Dramatically Lowers Contrast

ColorCore Technology

Specifications

Filter Size
40.5mm
Filter Type
Fog
Fog Density
3
Technology
ColorCore
Model Number
405F3

Pros & Cons

👍 Pros

  • Produces a convincing, natural-looking fog atmosphere directly in-camera
  • ColorCore construction ensures the effect is even and consistent across the frame
  • Maintains underlying image sharpness while softening contrast and highlights
  • 40.5mm threading makes it compatible with a range of compact and mirrorless lenses

👎 Cons

  • The Fog 3 density is strong and may be too heavy for scenes that need only a subtle effect
  • The 40.5mm size is relatively uncommon, limiting how many lenses it can be shared across
  • The effect is fixed and cannot be dialed back without swapping to a lower-density fog filter
  • Adds an extra glass element in front of the lens, which can increase the chance of flare in some lighting

Frequently Asked Questions

The number 3 refers to the fog density level. Tiffen Fog filters come in varying densities — the Fog 3 produces a strong, pronounced fog effect compared to lower-numbered versions like Fog 1 or Fog 2.
This filter has a 40.5mm thread size. It will fit any lens with a 40.5mm filter thread. Check the front of your lens or its specifications to confirm the thread diameter.
The filter is designed to maintain overall sharpness while dramatically lowering contrast and adding a soft glow. Highlights will bloom and spread, but fine detail in the scene is not lost entirely.
ColorCore is Tiffen's proprietary process where the filter effect is built into the glass itself, sandwiched between two layers of optical glass. This produces consistent, even filtration across the entire surface.

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