You should check Glass[1], which focuses strictly on photography. It does cost some money, but I see this as an advantage. There is basically zero spam, zero self-promotion, no "algorithm", no ads. And it even has RSS, which is how I mostly view photos (users may opt-out, though).
If you really don't want to spend any money, Pixelfed [2] is a good option.
Personally, I publish my photos on my own photography website and then syndicate them to Glass, Pixelfed and Instagram.