Reolink RLC-840A vs RLC-843A

Quick answer: choose the RLC-840A for a fixed 2.8mm wide view and simpler installation. Choose the RLC-843A when one mounting point needs motorized 5× optical zoom for tighter post-install framing.

Choose RLC-840A when the scene is already known

The fixed 105° horizontal view is well suited to entrances, short driveways, corridors and other positions where broad context matters more than long-distance framing. Fewer moving optical parts also keeps the camera conceptually simpler.

Choose RLC-843A when framing flexibility matters

The 5× optical zoom is the important upgrade. You can install the camera first and then narrow the scene optically around a gate, parking area or evidence zone without sacrificing native resolution through digital cropping.

What does not change

Both retain the core local-first PoE architecture: wired power/data, local microSD recording, NVR compatibility and documented RTSP/ONVIF support in Reolink’s wired ecosystem.

Which one should you buy?

If the camera will always cover the same entrance, corridor or short driveway, the RLC-840A’s fixed 105° horizontal view avoids paying for optical flexibility you may never use. If the exact evidence zone is hard to predict before mounting—or you need to narrow the view toward a gate, parking stall or longer approach—the RLC-843A’s 5× optical zoom is the meaningful upgrade.

The RLC-843A also makes more sense in reachable or exposed locations where its vandal-resistant dome architecture matters. For a protected mounting point where broad coverage is the priority, the simpler RLC-840A is usually the cleaner fit.

Related: Coverage & Focal Length Calculator · Reolink system review · Model Database.