The contest is sponsored by the Vietnam Association of Photographic Artists (VAPA), the International Federation of Photographic Art (FIAP), the Photographic Society of America (PSA) and Image Sans Frontiere (ISF).
Entries may feature open colour, open monochrome, travel and daily life.
Each entrant can submit a maximum of four photos per section that must have not previously won any prizes or displayed at any international contests held by Vietnam.
Entries should be sent to the organising board by October 15 at www.hopaphotocontest.com.
There will be 121 awards, including FIAP badges and prizes from VAPA, PSA, ISF and the sponsors.
The awards ceremony and the exhibition opening are expected to be held in Ho Chi Minh City in November.