Detent Zoom

Image: Detented Zoom Navitar offers an optional detented version of the zoom drive on its Zoom 6000 and 12X zoom lenses. This is most useful in the Metrology Market (measuring), where the end user calibrates each of the available detent positions. The action of the detent mechanism is such that, moving thru the detents (against gravity), the error in repeatability of magnification at any given detent will be essentially undetectable.

This option is only available in a "manual" format of operation, but motorized versions have their own techniques for repeatability.