NiSi Ring + Cap Kit for Ricoh GR IV: Setup and Care Tips
By T K FOTO TECHNIC PTE LTD | Published: 2026-11-02
Category: How-to Guides
Follow these steps to install the NiSi ring and cap kit on your Ricoh GR IV, avoid fit mistakes, and keep the aluminum rings and lens cap in good condition.
Quick answer
Install the NiSi ring + cap kit by first confirming your camera is a Ricoh GR IV, then threading the chosen ring onto the lens base, attaching the NiSi GR Lens Cap, and checking that any filter you use sits flush under the cap. Clean the rings and cap with a soft cloth and avoid overtightening to keep the kit working smoothly.
Why the ring kit is worth the extra step
The Ricoh GR IV has a retractable lens that benefits from added protection when carried in a pocket or bag. The NiSi kit gives you two aluminum-alloy rings in Royal Blue and Titanium Gray, plus a precision-coated lens cap. The rings also serve as an adapter base for NiSi 49mm filters and are compatible with standard GN-3 rings and the NiSi 49mm Filter Adapter.
The trade-off is that the cap is designed to fit over many filters mounted on the NiSi adapter, but extra-thick filters such as variable ND or circular polarizers may not allow the cap to seat fully. If you regularly use those filters, plan to remove the cap while shooting or accept a looser fit.
When to skip this kit
This kit is specifically designed for the Ricoh GR IV and is not compatible with the GR III. If you own a GR III, do not buy this kit expecting it to fit. Also, if you never use filters and prefer the slimmest possible pocket profile, the added ring and cap may feel unnecessary. The kit is most useful for photographers who want lens protection and a filter-ready setup without carrying a separate adapter.
Step-by-step setup and care
- Confirm camera compatibility: Check that your camera is a Ricoh GR IV. The kit is not compatible with the GR III. Look for the model name on the camera body or in the menu. If you own a GR III, stop here and do not attempt to force the ring.
- Choose and attach the ring: Select either the Royal Blue or Titanium Gray ring. Align the threads carefully and turn gently until snug. Do not overtighten; aluminum threads can be damaged by excessive force. Hand-tighten only; if the ring resists, unscrew and re-align before trying again.
- Attach the lens cap: Place the NiSi GR Lens Cap over the ring. It should sit flush if no filter is mounted. If you have a filter on the NiSi 49mm adapter, test the cap fit; extra-thick filters may prevent full seating. Remove the cap before shooting and store it in a pocket or bag to avoid loss.
- Check filter compatibility: If you plan to use filters, screw them onto the NiSi 49mm Filter Adapter (sold separately) or a compatible GN-3 ring. Verify that the cap can still be attached over the filter. For VND or CPL filters, expect the cap may not fit. Test your thickest filter with the cap before heading out; if it doesn't fit, plan to carry the cap separately.
- Clean and store the kit: Wipe the rings and cap with a soft, dry microfiber cloth. Avoid solvents or abrasive cleaners. When not in use, keep the spare ring and cap in a small pouch to prevent scratches. Inspect the ring threads periodically for grit; a clean thread prevents cross-threading.
Product facts
- NISI Ring + Cap Kit for Ricoh GR IV (2 Rings + Lens Cap): Designed for Ricoh GR IV (not compatible with GR III). Confirm your camera model before ordering to avoid a poor fit.
NISI Ring + Cap Kit for Ricoh GR IV (2 Rings + Lens Cap) - NISI Ring + Cap Kit for Ricoh GR IV (2 Rings + Lens Cap): Includes two aluminum-alloy rings (Royal Blue and Titanium Gray) plus the NiSi GR Lens Cap. You can change the look of your camera and have a spare ring if one is damaged.
- NISI Ring + Cap Kit for Ricoh GR IV (2 Rings + Lens Cap): Fully compatible with NiSi and standard GN-3 rings and the NiSi 49mm Filter Adapter. The kit integrates with common filter accessories, so you can add filters without a separate adapter.
- NISI Ring + Cap Kit for Ricoh GR IV (2 Rings + Lens Cap): Cap fits over many filters on the NiSi adapter, but extra-thick filters like VNDs or CPLs may not fit. Check your filter thickness before relying on the cap to protect a filtered lens.
