Fujifilm

Fujifilm MCEX-18G WR Macro Extension Tube Black

4.0 (12 reviews)

A weather-resistant 18mm macro extension tube for Fujifilm GF lenses that unlocks closer focusing distances.

$429.00*
In Stock on Amazon.com
View on Amazon

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

Affiliate Disclosure: Studio Supplies may earn a commission from qualifying purchases made through links on this page, at no additional cost to you. This helps support our editorial team.

Notice a mistake? Let Us Know

Overview

The Fujifilm MCEX-18G WR is an 18mm macro extension tube engineered specifically for the Fujifilm G mount system. By sitting between a GFX camera body and any GF lens, it reduces the minimum focusing distance and increases the magnification ratio, allowing photographers to capture fine details that would otherwise be out of reach. Unlike third-party alternatives, the MCEX-18G WR maintains full electronic communication with the lens, so autofocus, aperture control, image stabilization signals, and EXIF data all function as normal. This makes it a practical and cost-effective way to add macro capability to an existing GF lens collection without investing in a dedicated macro lens.

Built in Japan, the MCEX-18G WR features weather-resistant construction with sealing at the mount points, matching the durability standards of Fujifilm's WR-designated GF lenses and GFX bodies. When paired with similarly sealed equipment, it allows photographers to work confidently in light rain, dust, or humid conditions. The 18mm extension length is well suited for moderate close-up work and pairs effectively with shorter to mid-range GF focal lengths. For greater magnification, Fujifilm also offers the 45mm MCEX-45G WR, and the two tubes can be stacked for maximum close-focusing ability.

Key Features

Two types (18mm, 45mm) will be available. You can choose from the two types of tubes depending on the level of magnification you require

Package Dimensions: 13.0 H x 11.9 L x 12.8 W (centimetres)

Package Weight: 0.385 kilograms

Country of Origin : Japan

Specifications

Brand
Fujifilm
Model
MCEX-18G WR
Type
Macro Extension Tube
Extension Length
18mm
Mount
Fujifilm G Mount
Lens Compatibility
All Fujifilm GF Lenses
Weather Resistant
Yes
Country of Origin
Japan
Package Dimensions
13.0 x 12.8 x 11.9 cm
Package Weight
0.385 kg

Pros & Cons

👍 Pros

  • Weather-resistant construction matches the durability of Fujifilm's sealed GF lenses and GFX bodies
  • Maintains full electronic communication including autofocus and aperture control
  • 18mm extension length provides a useful magnification increase without excessive loss of infinity focus range
  • Made in Japan with build quality consistent with Fujifilm's professional GF accessories

👎 Cons

  • Only compatible with Fujifilm G mount lenses limiting it to the GFX medium format system
  • Reduces the minimum focusing distance but also eliminates the ability to focus at infinity when attached
  • 18mm extension provides relatively modest magnification increase compared to the 45mm version
  • Adds length and weight between the camera body and lens which can affect handling balance

Frequently Asked Questions

The MCEX-18G WR is compatible with all Fujifilm GF mount lenses used on the GFX medium format camera system.
Yes, the extension tube preserves full electronic communication between the lens and camera body, maintaining autofocus, aperture control, and EXIF data.
The 18G provides 18mm of extension for moderate magnification increases, while the 45G provides 45mm for greater magnification. The 18G is better suited for lenses with shorter focal lengths or when less extreme close-up capability is needed.
The tube itself is weather-sealed, but full weather resistance for the entire system requires a WR-rated GF lens and a GFX camera body with weather sealing to maintain protection at all mount points.