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Also cheap cameras at a higher resolution perform awful at night. A good brand of camera will give a specification sheet. For 4k (8MP), you would want near 1/1.2" cmos or larger... not a tiny 1/3" or 1/2.5" cmos sensor. In Reolink's video you can see how the person 'ghosts' into the background at points. https://www.youtube.com/watch?v=Y6Oxhxk8lxM Ghosting happens with a cameras exposure is too long for the amount of movement. A typical reason for a CCTV camera to have a long exposure is because the imaging sensor cannot capture enough light to capture a decent image. You can help reduce motion blur by adding external IR flood lights, but that adds extra power consumption.

Hi the problem with 4K and SD card storage only is the amount of data …… a day or so storage is pointless especially if you go away for weekend or on holiday it is better to have at least 2weeks storage to look back on cctv is not just for crime it also helps in other ways like disputes with parcels being delivered was it delivered or stolen also helps if someone else in the street has damage done to there cars …… it’s always good to view recordings going back more than a day or so many of my customers like seeing the wildlife around there property…… cats playing with hedgehogs…. Foxes and a customer sent me a picture of a albino badger and they are very rear in the uk