Free subject any kind of color works: Still Life, Product, Objects, Music & Dance, Food, Fine Art, Fashion, Conceptual, Beauty, Abstract, Science and Research.
An image is considered to be Monochrome only if it gives the impression of having no color (i.e. contains only shades of gray which can include pure black and pure white)
Seascapes, Panorama, Nightscape, Mountains, Macro, Landscapes, Underwater, Trees, Star Trail, Flowers & Plants, Birds, Environmental, Astrophotography, wildlife.
Any kind of Travel Photography, Trip memories & Adventures , Street Photography, Documentary, Photojournalism, Daily Life, Culture.