sharp focusing in a sentence

• After the $ 1.6 billion telescope was launched in April 1990, engineers discovered that a manufacturing flaw in the primary mirror prevented sharp focusing.
• Through sharp focusing of the probe within the sample, a focal point of very high intensity, up to TW / cm 2, can be achieved.
• After the $ 1 . 6 billion telescope was launched in April 1990, engineers discovered that a manufacturing flaw in the primary mirror prevented sharp focusing.
• Because it has such a short focal length, a Gregorian design could be employed which uses a concave secondary mirror at a point beyond the primary focus; this allows unusually sharp focusing across the field of view.
• The mirror was manufactured at The University of Arizona's Steward Observatory Mirror Laboratory, which pioneered both the spin-casting and the stressed-lap polishing techniques which are being used for telescope mirrors that include the 6.5 meter aperture Gregorian design could be employed which uses a concave secondary mirror at a point beyond the primary focus; this allows unusually sharp focusing across the field of view.
• It's difficult to see sharp focusing in a sentence .