Definition of Parfocal. Meaning of Parfocal. Synonyms of Parfocal

Here you will find one or more explanations in English for the word Parfocal. Also in the bottom left of the page several parts of wikipedia pages related to the word Parfocal and, of course, Parfocal synonyms and on the right images related to the word Parfocal.

Definition of Parfocal

Parfocal
Parfocal Par*fo"cal, a. [Pari- + focal.] (Opt.) With the lower focal points all in the same plane; -- said of sets of eyepieces so mounted that they may be interchanged without varying the focus of the instrument (as a microscope or telescope) with which they are used.

Meaning of Parfocal from wikipedia

- A parfocal lens is a lens that stays in focus when magnification/focal length is changed. There is inevitably some amount of focus error, but too small...
- changes as focal length (and magnification) changes, as compared to a parfocal ("true") zoom lens, which remains in focus as the lens zooms (focal length...
- lens (prime lens). A true zoom lens or optical zoom lens is a type of parfocal lens, one that maintains focus when its focal length changes. Most consumer...
- focaccia, focal, focus, foyer, fuel, fusillade, multifocal, omnifocal, parfocal, refocus, refuel, trifocal, varifocal foedus foeder- confederate, confederation...
- the transparent medias of eye. Viewing arm and illuminating arm are kept parfocal. This type of illumination is useful for depth localization. Direct focal...
- lengths (18–35 mm) Zoom which maintains focus as the focal length changes (parfocal lens) Aspherical lens with fast and large lens aperture Servomotor control...
- without electronic control of the aperture or autofocus. In contrast, parfocal adaptation of EF lenses to non-EF camera bodies is not possible with only...
- circular from f/4 to f/8. It is one of the few Canon photo lenses that are parfocal. The 17–40mm is the least expensive of Canon's current wide-angle zooms...
- select the required objective lens. These arrangements are designed to be parfocal, which means that when one changes from one lens to another on a microscope...
- this is also handled well by the in-camera corrections. The lens is near parfocal. The lens has an internal linear autofocus motor. It supports both manual...