If you like Filipino food, it's worth the trip to go to Salo-Salo Grill (check them online). If you've never had Filipino food, it's DEFINITELY worth the trip (I suggest the chicken adobo, rice and lumpia).
A good place for lunch and camera work (I'm going to assume that bring your rig) is the In-N-Out Burger at the east end of the runways at LAX, if the planes are coming in from the east. Actually, you want to be in the little grass area next to the In-N-Out, because you haven't lived until you've had a 747 fly over you so low that you could read the stencils on the bottom of the plane. A good place for practice catching stuff coming overhead.
Tour the Jet Propulsion Laboratory: http://www.jpl.nasa....ts/tours/views/ -- you might want to check with them about bringing your rig.
WhollyOdd -- er, I mean Hollywood -- Blvd.
The Mormon Temple visitor center.
Mulholland Drive overlooking LA.
Mullholland at Edwards Corner (https://www.wired.co...land-the-snake/), usually good for a few motorcycle crashes on any warm Saturday, You want to STAY UP ON THE HILL. Don't ask how I know this.
The air museum at Chino Airport.
There are some other good museums. Some don't allow photography.
Most of SoCal is "film related," so pick a couple of your favorite films or TV series, figure out where their locations were, and go look at those places today (for instance, you wouldn't recognize Rampart Station today as being related to "ADAM-12" but Station 127 out in Carson still looks like when they shot "Emergency!" there).