[Chazno]

Beneath the planet of the apes had a budget of 2.5 million to 4.7 depending on who you ask. 2.5 inflated to today is around 16 Million. If you take into account the cost of set design for filming in SD versus HD there is an even bigger difference.

Side note: I toured NBC Studios in NY just at the onset of the HD revolution. They had one News set that was HD the rest were SD. They told us that they could use cardboard and duct tape on the SD set and they would look like wood and stainless steel once they added a bit with markers.