How to Set Up the NiSi Compact Filter System on a Ricoh GR3x
By NiSi Filters Australia | Published: 2026-11-03
Category: How-to Guides
Follow these steps to mount the NiSi GR3x filter holder, align graduated filters, and add a Black Mist kit without disturbing your compact camera setup.
Quick answer
Attach the NiSi adapter ring first, then seat the filter holder or Black Mist adapter before adding glass. The GR3x has a fixed lens, so every filter change happens at the front ring, not on a removable lens.
Why the adapter ring is the foundation
The GR3x has no filter thread on its lens barrel, so the NiSi system starts with a dedicated adapter ring. The NiSi 49mm Filter Adapter MKII is machined specifically for the GRIIIx body and uses an auto-lock mechanism to stay seated during handheld shooting. That locking design matters on a pocket camera because you often pull it in and out of a bag between frames.
The adapter is not cross-compatible with the Ricoh GRIII or GRIV. If you own more than one GR body, label the adapter so you do not force it onto the wrong camera.
When the Master Kit makes sense versus the Black Mist kit
The Master Kit is the landscape and high-contrast kit. It includes a holder that rotates 360 degrees and accepts up to two square filters, plus a Medium GND8, Soft GND8, HD Polariser, ND8, ND64, and a pouch. Choose it if you photograph skies, water, or bright scenes where you need to hold back highlights or slow the shutter.
The Black Mist kit is a different tool. It uses a 49mm adaptor to mount circular filters and softens highlights and contrast for a cinematic look. It is not a replacement for ND filtration. If you want both effects, plan to swap adapters rather than stack the two systems.
A checkpoint on filter stacking and rotation
The Master Kit holder accepts up to two square filters, but stacking a polariser and a graduated filter can cause vignetting on a wide scene. Rotate the holder to set the graduated transition before you tighten anything, and check the corners at your working aperture. If you see dark corners, remove one filter rather than forcing the holder.
Step-by-step setup for the NiSi GR3x filter system
- Clean the front ring and check the adapter: Wipe the GR3x front ring and the NiSi 49mm Filter Adapter MKII with a dry cloth. Confirm the adapter is the GRIIIx version, not a GRIII or GRIV adapter, before you align it. A dry fit without glass prevents cross-threading and shows whether the adapter seats flush.
- Seat the adapter and engage the auto-lock: Press the adapter onto the front ring until it sits gap-free, then turn it until the auto-lock clicks or stops. Gently tug the adapter to confirm it will not rotate or detach. If the adapter rocks, stop and reseat it; do not force the lock.
- Choose the holder or the Black Mist adaptor: For graduated and ND filters, fit the Master Kit holder onto the adapter. For the Black Mist look, remove the holder and fit the Black Mist kit’s 49mm adaptor instead. Do not try to mount both at once. Decide which effect you need before attaching glass, because the two adapters are swapped, not stacked.
- Insert the first square filter and set rotation: Slide the Medium GND8 or Soft GND8 into the holder with the transition line where you want it, then rotate the holder 360 degrees to align the gradient with the horizon. Tighten only enough to hold position. Rotate before tightening; overtightening makes fine alignment harder.
- Add a second filter only after a corner check: If you need a polariser or ND alongside the graduated filter, slide it into the second slot, then shoot a test frame at your working aperture and inspect the corners. Remove one filter if vignetting appears. Two filters are the holder’s limit; a third-party stack is not supported by the holder design.
- Switch to the Black Mist kit for diffusion: Remove the square holder, fit the Black Mist 49mm adaptor, then thread on the Black Mist filter. Check that the filter is fully seated before shooting, since the effect softens highlights rather than blocking light. The Black Mist kit changes contrast, not exposure; do not treat it as an ND substitute.
- Store and transport without strain: Remove the holder and filters before packing the camera, and place the adapter in the included pouch. Leave the adapter ring on only if your bag has clearance around the front ring. A mounted holder is the most likely part to catch on a bag seam, so remove it first.
Product facts
- NiSi Compact Filter System for Ricoh GR3x (Master Kit): Holds up to two square filters and rotates 360 degrees. You can align a graduated filter to the horizon without removing the holder, but stacking two filters requires a corner check.
NiSi Compact Filter System for Ricoh GR3x (Master Kit) - NiSi Black Mist Filter Kit for Ricoh GR3x: Includes a 49mm adaptor that mounts any standard 49mm circular filter to the GR3x. The Black Mist effect can be combined with other 49mm circular filters, but not with the square Master Kit holder at the same time.
NiSi Black Mist Filter Kit for Ricoh GR3x - NiSi 49mm Filter Adapter MKII for Ricoh GRIIIx: Auto-lock mechanism keeps the adapter seated during handheld or street photography. The adapter resists loosening when you slide the camera in and out of a pocket, so check the lock before each session.
