NiSi 49mm Filter Adapter MKII for Ricoh GRIII

Overview

The NiSi 49mm Filter Adapter MKII for Ricoh GRIII is a precision-engineered accessory that replaces the Ricoh GN-1 ring and adds standard 49mm filter thread compatibility to your camera. Designed specifically for the Ricoh GRIII, it expands the camera’s creative flexibility while preserving the compact handling that makes the GRIII so popular for everyday carry, travel, and street photography.

With a secure auto-lock mechanism, gap-free fit, and tool-free installation, this adapter integrates cleanly with the camera body for dependable everyday use. It allows photographers to mount a wide range of 49mm filters for creative effects, exposure control, and lens protection, turning the GRIII into a more versatile photographic tool.

Core Features

• Designed specifically for the Ricoh GRIII and replaces the Ricoh GN-1 ring adapter.
• Adds a standard 49mm filter thread for compatibility with a wide range of photographic filters.
• Features an auto-lock mechanism that helps keep the adapter securely attached during shooting.
• Provides a precision-machined, gap-free, play-free fit for a clean integrated feel on the camera body.
• Supports diffusion, CPL, ND, UV, and clear protective filters for expanded creative and practical use.
• Installs quickly without tools using a clearly marked alignment point.

Expanded Creative Control

By adding standard 49mm filter threading, the adapter gives GRIII users access to a much broader filter ecosystem. It can be used with diffusion filters for a softer cinematic look, circular polarizers for managing reflections and enhancing colour saturation, ND filters for long exposures or wider apertures in bright light, and UV or clear filters for everyday lens protection.

Secure Everyday Handling

The mechanical auto-lock system is designed to provide a more confident fit than simple friction-based alternatives. Once mounted, the adapter stays firmly in place to reduce the risk of loosening or accidental detachment during handheld shooting, making it especially well suited to fast-moving street, travel, and walkaround photography.

Practical Protection and Compatibility

The adapter makes it easy to leave a protective 49mm UV or clear filter mounted on the camera to help guard the lens against dust, scratches, and fingerprints. It is also compatible with the optional NiSi PR-5 Lens Cap, allowing convenient front protection while the adapter remains attached.