For visitors, Equatorial Guinea is infamous for its high prices and hard-to-get visas for most. This is nominally a police state, akin to Turkmenistan and North Korea (minus the minders and organized persecution of its inhabitants). As a result, tourist infrastructure is sparse and it is not a high priority for the government.
Taking photos of any government properties is strictly prohibited without permission. Don’t photograph airports, government buildings, or anything of military or strategic value. Locals, including children, are generally averse to foreigners taking their picture. As a general rule, don’t bring a camera while walking around town as this can lead to trouble with the police.
A permit from the Ministry of Information and Tourism used to be necessary to take photographs in public, and whilst this requirement has been lifted police may still attempt to fine or even arrest persons trying to take photographs.