"exact focus" is a correct and usable phrase in written English.
It can be used when you are referring to a specific point of focus that is precise and exact. For example, "She was able to paint a beautiful portrait with exact focus on the eyes of her subject."
Exact focus for this arrangement, however, could not be attained.
The exact focus of the investigation is unclear, but people with knowledge of it said Justice Department lawyers were focusing on whether companies had agreements not to go after each other's employees.
The exact focus of the investigation has been something of a mystery since word leaked in June that it was under way, perplexing lobbyists, lawyers and even the lawmakers being singled out.
When we are interested in the exact focus of the convergent beam, we need to propagate the collimated beam to infinity (i.e., far field).
The exact focus of the hearing is not known, but the meeting could be a first step towards establishing dedicated federal support for geoengineering research, which currently does not exist.
Interference in WLI is used to determine when a point on the sample is in exact focus, as the instrument is adjusted to give maximum constructive interference at best focus.
In addition to known methods of targeting drugs to cells, including antibody, protein or peptide, liposomal, and magnetic targeting [ 43– 50], use of ultrasound affords a direct and exact focusing on the treated site.
David Dorfman has always been drawn to political themes, and in the last few years his love for rebels — the Weather Underground in his 2006 dance "underground," and the radical abolitionist John Brown in his newest production — has given his dance-theater works an exacting focus.
But the Big Data revolution actually began in earnest in the late 1970s at the Stanford Research Institute, where a corporately funded endeavor to create more exacting "focus groups" was launched using punch-card computers and mass surveying techniques.
She then marries that exact flow with an exacting focus, destroying her enemies via withering barbs about their underwear, lips and more.
Additionally, it was theoretically reported that a double-ring-shaped radially polarized beam potentially forms a dark spot around the focal point in an exacting focusing condition [13].
