Laowa Aksen Ultra Macro Series launches today — the first camera-mount lens system to zoom continuously from 1x to 10x ...
Double Objectives for 3.5x to 230x Zoom With the parfocal objectives and two-position revolving nosepiece, switching between objectives is very quick and easy, requiring little refocusing. Therefore, ...
The parfocal distance is the distance between the position where the objective is mounted and the focal plane of the specimen. Theoretically, objectives which have the same parfocal distance but ...