2MP (1080p) covers the widest mix of formats in one range here: analogue-compatible turrets, PoE IP turrets and domes, and a long-throw PTZ. Pick by signal type first, then by lens/optical requirement and power method.
Cross-checking PoE budget, connector type (BNC vs RJ45) and NVR/DVR compatibility against existing infrastructure remains the key sizing step before order.
PoE models (e.g. DS-2CD1327G2-LUF, DS-2CD2723G0-IZS) run over RJ45 network cable with power and data combined; AHD/TVI/CVI/CVBS units like the UKVISION turret run over coax for upgrading existing analogue systems.
The Hikvision DS-2DE4A225IW-DE(S6) PoE PTZ and the DS-2AE5225TI-A-E Turbo HD PTZ both offer 25x zoom for scanning larger areas, one over IP and one over analogue/HD-TVI.
They're Hikvision's low-light imaging technologies, built into models such as the DS-2CE72DF3T-PIRXOS and the 25x DarkFighter speed dome, aimed at improved colour or range in low-light conditions.