There are three different ways here of seeing something a long way off. Classic 7x50 binoculars with BAK4 prisms work in daylight and are waterproof to IPX7; thermal monoculars with 384x288 and 640x512 sensors show heat even in complete darkness. FNIRSI night vision devices use infrared illumination and record what they see as a 4K file. Choose according to whether you will be watching by day, at dusk or in real darkness.
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There are three different ways here of seeing something a long way off. Classic 7x50 binoculars with BAK4 prisms work in daylight and are waterproof to IPX7; thermal monoculars with 384x288 and 640x512 sensors show heat even in complete darkness. FNIRSI night vision devices use infrared illumination and record what they see as a 4K file. Choose according to whether you will be watching by day, at dusk or in real darkness.