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lenses: set up or arranged so that when one lens is changed for another, there is no change in focus. * Applied usually to turret mounted lenses e.g. on microscope; also in telescopes: ~ eyepieces: changing one for another does not require refocusing. * When the distance from the object to the rear principal plane of each lens is equal, they are said to be parfocal.
Parfocal capability refers to the ability of a lens system, such as a microscope or a camera lens, to remain in focus when magnification is changed. This means that once the focus is set at a particular magnification, the image will stay relatively sharp when switching to a different magnification level without the need for major adjustments.
A parfocal microscope is a microscope that stays in focus when it is switched from a higher power to a lower power. For example, if the microscope is switched from 40x power to 10x, the object stays in focus.
Parfocal capability is the ability of different eyepieces, such as telescopes or microscopes, to focus their images in the same plane. These eyepieces or lenses can then be interchanged without readjusting the instrument.
Parfocal microscope objectives stay in focus when magnification is changed. If the microscope is switched from a higher power objective to a lower power objective the object stays in focus.
Parfocal is a lens. It is a lens that stays in focus when magnification is changed. Parfocal lens are found in microscopes or telescopes.
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What property of a compound light microscope enables a person to change objectives without major focusing adjustments?
Parfocal lenses allow a person to switch objectives on a compound light microscope without needing significant focusing adjustments. This means that when changing objectives, the specimen remains in focus with only minor adjustments needed.
A microscope that maintains focus when the objective magnification is increased is called?
A microscope with the ability to maintain focus when changing objectives is called a parfocal microscope. This feature allows for easier and faster transition between different magnifications while keeping the specimen in focus.
Why is it desirable for microscope lenses to be parfocal and parcentric?
Parfocal lenses stay in focus when magnification is changed, reducing the need for continuous refocusing. Parcentric lenses maintain the center of the field of view when changing objectives, making it easier to locate and track specimens. This consistency in focus and centering enables smoother and more efficient microscopy workflows.
Anaerobic Threshold is the point at which aerobic oxygen demands exceed capability true or false?
Anaerobic Threshold is the point at which aerobic oxygen demands exceed capability
Which term refers to the ability of a microscope lens to show fine details of the object being?
Resolution refers to the ability of a microscope lens to show fine details of the object being observed. It is the minimum distance between two points at which they can still be distinguished as separate entities.
What is the advantage of the parfocal lenses?
The advantage of a parfocal microscope=when different objective lenses are rotated, the object being examined will remain in view
If after focusing in low power only the fine adjustment need to be used to focus the specimen at the higher powers the microscope is said to be?
parfocal.
What property of a compound light microscope enables a person to change objectives without major focusing adjustments?
Parfocal lenses allow a person to switch objectives on a compound light microscope without needing significant focusing adjustments. This means that when changing objectives, the specimen remains in focus with only minor adjustments needed.
Why is it helpful for a microscope to be parfocal?
Having a parfocal microscope means that when you switch to a higher magnification lens, the specimen stays nearly in focus. This saves time by reducing the need for constant refocusing when changing magnifications, allowing for a smoother and more efficient workflow during microscopy.
What is meant by the terms parcentric and parfocal?
Parcentric refers to the alignment of optical elements in a microscope so that the center of the field of view remains constant when changing objectives. Parfocal means that when changing objectives on a microscope, the image stays approximately in focus.
A microscope that maintains focus when the objective magnification is increased is called?
A microscope with the ability to maintain focus when changing objectives is called a parfocal microscope. This feature allows for easier and faster transition between different magnifications while keeping the specimen in focus.
What word is used to indicate if object is in focus at low power it will also be in focus at high power?
Parfocality is the term used to indicate that when an object is in focus at low magnification, it will also remain in focus at higher magnifications without the need for refocusing.
What characteristic of a microscope enales one to switch from one objective to another without altering the focus?
it is parfocal
What word is used to indicate that if the object is in focus at low power it will also be in focus with high power?
parfocal
What word is used to indicate that if the object is in focus at low power it will also be in focus at high power?
Parfocal
What type of microscope doesn't change focus when shifting objectives?
A "parfocal" microscope maintains its position as objectives are changed.
What is the microscope said to be when the fine adjustment is the only thing needed to be used to focus when in the highest power?
I think it is parfocal
