NiSi 49mm Filter Adapter MKII for Ricoh GRIII

The NiSi 49mm Filter Adapter MKII for Ricoh GRIII is a precision-engineered accessory that expands the creative capabilities of your compact camera while providing added lens protection.

Designed specifically for the Ricoh GR III, this adapter ensures a gap-free, play-free fit, delivering a secure and seamless connection to the camera body. (Note: It is not compatible with GR III or GR IV models.)

A standout feature is its auto-lock mechanism, which firmly secures the adapter in place, preventing accidental loosening—ideal for handheld and street photography where reliability is essential.

With a 49mm filter thread, you can attach a wide range of filters such as: ND filters for motion blur, CPL filters for reflections and color enhancement, Black Mist filters for cinematic diffusion, ANDUV or clear filters for everyday lens protection

This makes it easy to enhance image quality and creative control while also safeguarding your lens from dust, scratches, and fingerprints.

The adapter offers tool-free installation, with a clearly marked alignment point for quick and intuitive mounting and removal—perfect for photographers on the move.

It’s also compatible with the NiSi PR-5 lens cap (sold separately), allowing you to keep your camera protected even when the adapter is attached.

Compact, durable, and highly functional, the NiSi 49mm Filter Adapter MKII is an essential upgrade for GRIIIx users looking to unlock filter compatibility and protect their lens without compromising portability.

Product Features in Detail

NiSi 49mm Filter Adapter MKII for Ricoh GRIII
The NiSi 49mm Filter Adapter for Ricoh GRIII is the essential accessory for photographers who want to unlock the full creative potential of their GRIII compact camera. Precision-engineered as a direct replacement for the Ricoh GN-1 ring adapter, it adds a standard 49mm filter thread to the GRIII, opening the door to a complete range of photographic filters without compromising the camera’s compact, pocketable form factor.

At the heart of the design is a secure auto-lock mechanism that holds the adapter firmly in place during shooting. Unlike friction-fit alternatives, NiSi’s mechanical locking system eliminates loosening and accidental detachment, giving photographers confidence during fast-paced street photography, travel, and everyday use. Once attached, the adapter sits flush against the camera body with a gap-free, zero-play fit that feels like a factory-integrated part of the GRIII.

With full 49mm filter thread compatibility, photographers can mount NiSi Black Mist diffusion filters for cinematic atmosphere, circular polarizers (CPL) for reflection control and color saturation, ND filters for long exposures, or UV and clear protection filters to shield the front lens element from dust, moisture, scratches, and fingerprints. The adapter transforms the GRIII into a more versatile creative tool while maintaining its signature portability.

Installation is fast and completely tool-free. A clearly marked alignment point guides the adapter into position, and attachment or removal takes just seconds. Ideal for photographers who need to adapt quickly in the field.

The NiSi 49mm Filter Adapter is also fully compatible with the NiSi PR-5 Lens Cap for Ricoh GRIII/GRIV series (sold separately), ensuring seamless lens protection even with the adapter permanently mounted on the camera.

Built with the same optical-grade engineering standards NiSi is known for across its filter systems, the 49mm Filter Adapter for Ricoh GRIII is the smart, reliable way to expand what your GRIII can do.