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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.
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∙ 15y ago
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∙ 9y agoA 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.
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∙ 9y agoParfocal 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.
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∙ 14y agoParfocal 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.
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∙ 9y agoParfocal is a lens. It is a lens that stays in focus when magnification is changed. Parfocal lens are found in microscopes or telescopes.
Wiki User
∙ 9y agoIt is important to know what things are, in order to understand them better. Parfocal objectives is the ability to change objectives with differing powers and still have sharp focus.
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What property of a compound light microscope enables a person to change objectives without major focusing adjustments?
It's Parfocal property."Parfocal: This is a focus issue. When changing from one objective to another, the new image should be either in focus or close enough so that you can refocus with only minor adjustments. Most microscopes are parfocal." from www.microscope-microscope.org
A microscope that maintains focus when the objective magnification is increased is called?
parfocal
Why is it desirable for microscope lenses to be parfocal and parcentric?
Microscope lenses that are parfocal and parcentric allows the user to changed between lenses will keeping the speicemen focused and centered, instead of having to adjust the x, y or z plane (i.e. focus and the stage).
Which term refers to the ability of a microscope lens to show fine details of the object being?
I think it's Resolution.....
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
What property of a compound light microscope enables a person to change objectives without major focusing adjustments?
It's Parfocal property."Parfocal: This is a focus issue. When changing from one objective to another, the new image should be either in focus or close enough so that you can refocus with only minor adjustments. Most microscopes are parfocal." from www.microscope-microscope.org
What word is used to indicate if object is in focus at low power it will also be in focus at high power?
parfocal
Why is it helpful for a microscope to be parfocal?
Once the object is in focus with lowest power, it should also be almost in focus with the higher power.
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
A microscope that maintains focus when the objective magnification is increased is called?
parfocal
Why is it desirable for microscope lenses to be parfocal and parcentric?
Microscope lenses that are parfocal and parcentric allows the user to changed between lenses will keeping the speicemen focused and centered, instead of having to adjust the x, y or z plane (i.e. focus and the stage).
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
How to describe the feature of the microscope that makes it possible to move among the objective lenses with only minor focusing?
Parfocal
