Here is a great photo taken of a Lufthansa 747-400 and a United Airlines 757-200 that were on simultaneous approaches to runways 28L and 28R at San Francisco (SFO).
The separation requirement for flying parallel and simultaneous approaches is 225 meters (738 feet). These two aircraft are at a safe distance for the approaches they
are each flying.
Due to the Lufthansa 747 being three times larger than the 757 and being slightly behind , gives us this incredible optical illusion
