RICOH GA-3 Lens Adapter for GR IV 640 ISO * 【NANOTEC】Our optical engineers developed

* 【NANOTEC】Our optical engineers developed new Nano coating layer technology， Waterproof

Battery-Free Design: Eco-friendly and cost-effective

like ISO 25 / 50 / 64 / 100

8 maximum aperture at wide end

Ideal for outdoor use

RICOH GA-3 Lens Adapter for GR IV 640 ISO * 【NANOTEC】Our optical engineers developedMain Uses: Mounts the GW 4 Wide Conversion Lens (changes focal length to ~21mm equivalent) Supports standard 49mm filters (49mm thread) Compatibility: Ricoh GR IV only Design: Screw on or bayonet style mount (secure fit); acts as a base ring hood adapter Color: Black Material: Likely metal plastic mix (sturdy, matches GR IV look) Weight & Size: Very lightweight and compact (adds minimal bulk to keep the GR IV pocketable)