annke cameras can be added on hik nvr without any problems.i had installed a few of them with the annke firmware.it works just fine.just go ahead and do it.
Hello ! i have updated 3 I51DE and 1 I51DF Annke 5mp poe cameras from V5.5.110 build 200120 to firmware V5.5.800 build 210816 from Hikvision.i noticed that resolution 2560 x 1920 is gone only 2560 x 1440 is available.any chances this will be fixed with future firmware.i guess firmware is for 4MP...