It is looking for photographs taken in England or Wales in the categories of commons, greens, paths, enjoyment, landscapes, historic and open (a subject of the photographer’s choice) for the free entry contest.
Trustee Chris Beney, said: "We want people to think about what open spaces mean to them—freedom, views, enjoyment, coast, family, play, in fact anything they love or which inspires them. Even historic photographs from grandfather’s collection will be welcome."
The closing date is 30 September and people can enter as many times as they like, in as many categories as they like.
The society will award prizes in all categories as well as a prize for the overall winner. It will also award prizes for highly-commended submissions.
Individual prizes will be up to £100 in value. For more information see the society’s website.