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Q: What is the disadvantage of parfocal objectives?
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What type of microscope doesn't change focus when shifting objectives?

A "parfocal" microscope maintains its position as objectives are changed.


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 is parfocal capability?

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.


What are the disadvantage of aims and objectives in a business?

c-Documents and Settings


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 are the disadvantages of using the High power Objectives?

THE disadvantage of using high power objective is to


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