It is quite common to push-process Kodak Vision 500T one stop to ASA 1000.
Of course, Stanley Kubrick shot Barry Lyndon before the widespread availability of T-grained film. Thus, the high-speed film available in 1975 would've been much grainier.
What does it mean to "push-process" film to a higher ISO? Is that the film equivalent of shooting digital at ISO 500 and then increasing the exposure a stop in Lightroom?
You intentionally underexpose the film when you shoot, pretending that it has a higher ASA rating than it actually does.
You then increase the time and/or the temperature when developing the film, to compensate for the underexposure. You end up with a correctly-exposed image, but at the cost of extra grain, extra contrast, etc.
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It is quite common to push-process Kodak Vision 500T one stop to ASA 1000.
Of course, Stanley Kubrick shot Barry Lyndon before the widespread availability of T-grained film. Thus, the high-speed film available in 1975 would've been much grainier.
What does it mean to "push-process" film to a higher ISO? Is that the film equivalent of shooting digital at ISO 500 and then increasing the exposure a stop in Lightroom?
Similar.
You intentionally underexpose the film when you shoot, pretending that it has a higher ASA rating than it actually does.
You then increase the time and/or the temperature when developing the film, to compensate for the underexposure. You end up with a correctly-exposed image, but at the cost of extra grain, extra contrast, etc.