Some of these frames simply contain mirrors but others contain displays of accessories, apertures, lighting equipment and handles for the fitting room doors.
Proper focusing is critical at night because small apertures are often impractical — therefore one cannot afford to waste mispositioning the depth of field (see hyperfocal distance).
An aperture mask assembly includes a rotatable frame and a mask having apertures.
You're going to be dealing with long-exposures and wide-open apertures, which means any environmental light will creep into the frame and overpower the image.
Above, irregularly shaped apertures puncture the elevation, lending the scheme a playfully abstract quality.
Topics covered in geometrical optics include: ray-tracing, aberrations, lens design, apertures and stops, radiometry and photometry.
Electroformed apertures reproduce the mandrel photo resist finish faithfully and do not require any further processing.
But the researchers are confident that efficiency rates of up to 19% can be achieved through better insulation and smaller apertures.
In the process of splicing the urban and country cadastral mapsheets, it may cause apertures and precision difference easily because of large scale spans among corresponding mapsheets.
The epidermis of culm of S. alterniflora, S. patens and S. cynosuroides is all made up of long cells, short cells (cork cells and silica cells), salt glands and stomatal apertures.
Just like a lens has a range of apertures, your camera has a range of shutter speeds.
At last the light intensity distribution of Fresnel diffraction at several rectangular apertures is calculated and analyzed.
國文精選館
