lens tube 镜头筒,镜头筒 相关短语 calibrated focal length (航摄镜头) 标定焦距 Grandagon (德国的105度广角镜头) 格朗达汞 print pad (花筒) 印轧 slide (显微镜的) 玻璃片 heavy wire screen (用于筒筛) 重型金属丝筛网 total magnification (显微镜) 总放大倍数 cup dolly(夹卡筒形工件用) 圆形抵座 Ma...
As the focal length of the tube lens is increased, the distance to the intermediate image plane also increases, which results in a longer overall tube length. Tube lengths between 200 and 250 millimeters are considered optimal, because longer focal lengths will produce a smaller off-axis angle ...
aWhen using an extension tube of same length, the image magnification ratio becomes smaller as the focal length of master lens becomes longer and the larger as the focal length becomes shorter. Also,the distance to the subject becomes further away as the focal length of master lens becomes ...
Specifications: Material: PVD Znse Focus Lens and Mo Mirror Diameter: Available in 12mm and 18mm Focal Length: 50.8mm Package Includes: 3pcs 20mm diameter Mo Mirrors and 1pc Znse Lens Compatibility: Suitable for Co2 Laser Machine Performance: Enhanced deep engraving and cutting capabilities Features...
Focal Length Adjustable Zoomar Lens Focus Zoom Recessed 10W Indoor Under Cabinet LED Spot Light, Find Details and Price about LED Spot Light LED Tube from Focal Length Adjustable Zoomar Lens Focus Zoom Recessed 10W Indoor Under Cabinet LED Spot Light...