Stringently speaking, CD45+ CD11b- CD11c+/hi MHCII+ F4/80- for DCs and CD45+CD11b+CD11c- MHCII+ F4/80+ for macrophages. You will lose the CD11b+ CD11c+ population that contains both macrophages and myeloid DCs doing this. F4/80 is a good macrophage-restricted marker but it only works with murine cells. Alternatively, CD115 is also relatively restricted to macrophages in mice and human cells. In human cells, CD209 is restricted to DCs but is not found on all DC subsets.