https://www.microscopeworld.com/t-parfocal_microscope_objectives.aspx

"Parfocal" refers to objectives that can be changed with minimal or no refocusing. Parfocalling compound microscope objectives is a procedure which allows you ...

https://en.wikipedia.org/wiki/Parfocal_lens

Parfocal microscope objectives stay in focus when magnification is changed; i.e., if the microscope is switched from a lower power ...

https://www.greatscopes.com/glossary.htm

Glossary of microscope terms for the layman and the Anatomy of the Microscope. ... Parfocal: A microscope that is “parfocal” is one which, if it is in focus with one ...

https://www.merriam-webster.com/dictionary/parfocal

Parfocal definition is - being or having lenses or lens sets (such as ... without varying the focus of the instrument (as a microscope) with which they are used.

https://www.dictionary.com/browse/parfocal

Parfocal definition, of or relating to different eyepieces (of telescopes or microscopes) that all focus their images in the same plane, so that they can be ...

https://sciencing.com/why-is-it-desirable-that-microscope-objectives-be-parfocal-12742456.html

Apr 24, 2017 ... "Parfocal" is a term that literally means "side-by-side focus." All of the objective lenses in a parfocal microscope have focal points that are all in ...

https://www.microscopyu.com/microscopy-basics/working-distance-and-parfocal-length

The parfocal length is the distance between the specimen plane and the shoulder of ... Microscope objectives are generally designed with a short free working ...

https://www.celestron.com/blogs/knowledgebase/what-are-parfocal-objectives

Nov 24, 2008 ... With a parfocal microscope, a slide that is in focus with the 40x objective will still be in focus when using less powerful objectives with little or no ...

https://www.youtube.com/watch?v=Kj5X32aMqz8

Jun 27, 2014 ... Wondering why you have to re-focus your microscope each time you adjust the lens or positioning...? Watch this video on how to parfocal your ...

https://www.flashcardmachine.com/microbiology-bio-210lab.html

Oct 3, 2011 ... Parfocal. Definition. the ability of a microscope to remain in focus when changing from one ... 5. use dust cover when done with microscope ...