'The Omega Man' was of course an adaptation of Matheson's novel and is a second film version of it. But the technical challenges were vast. Find a time of day when L.A.'s deserted? Do me a favor! It's a miracle they got anything decent on film. Yes there are distant cars in the back of that zoom out at the top of the film but these guys didn't have computers did they?
Anyway, Heston looks amusingly dated in the role of Neville wearing his safari jacket and skintight tracksuit while he prowls the 'deserted' streets. The thing about Chuck is he just LOOKS like a film star. Just driving a car he grabs your attention. The supporting cast here are less engaging. An afro and 'Hey man' too many perhaps. The writers seemed desperate to tap into 70s pop culture. A sure-fire way to date your film.
The camera crew on this film must have gone straight onto 'Quincy' after they'd finished this. It's bizarre. There are dolly moves for no reason whatsoever (when Heston first enters his apartment and later before he discovers the sardine tin), zooms that hit the end stop so hard they almost bounce back and roving pans where you actually feel for the operator while he tries to find where the hell Chuck's car's gone. But this is one of the things that makes 70s cinema so great. The raw elements of film-making are on display.
Ron Grainer's score is genius in places and god awful in others. It goes from the brilliant main title theme to the woeful chase music when Heston pursues the leading lady. There's also the typically almost pink-tinted blood. Why couldn't they get blood right back then?
'The Omega Man' is an engaging, thought-provoking but very dated piece of cinema. The last image of Heston is immortal even if the film's hair-dos are not. Watch it, enjoy it and cut it some slack.