and toric lenses are the most common. These lenses are designed specifically to combat astigmatism and are made with different powers of magnification in different meridians of the lens, which is what helps them to correct the astigmatism. They come in both soft and rigid gas permeable (RGP...
I understand the physics of the crop sensor and the 1.5 magnification but I thought the E lenses were designed specifically for the APS-C sensor and would reflect the actual focal distance? Clearly I’m still learning so sorry if this sounds really dumb! I just wonder, does one always ...
Yet the basic principles of these advanced microscopes are a lot like those of the student microscope you may have used in your first biology class. In this edition of HowStuffWorks, we will enter the tiny world of light microscopes and examine the various technologies that let them expose ...
Analogous to conventional lenses, various coupling schemes can fulfil this task, including metamaterials with shaped interfaces (left), a planar plasmonic metal-insulator-metal waveguide coupler (middle) and GRIN metamaterials (right). When the focal length is defined, the imaging magnification is ...
Zoom Lenses Fujifilm Optical Devices Europe GmbH has expanded its lineup of the full HD Fujinon zoom lens series with 32 and 60× optical magnification. The well-known 60× tele-zoom lens series D60×16.7 features 2-MP/full-HD resolution and covers a focal length range of f = 16.7 ~1000...
where n is the index of refraction and R is the radius of curvature of the lens surface. These lenses are fabricated from N-BK7, which has an Abbe Number of 64.17; this value is an indicator of the dispersion.These N-BK7 Plano-Convex lenses are available uncoated or with one of five ...
It is demonstrated that the recommended working distances for different powers of Volk ophthalmoscopy lenses approximate optimal matching between the various pupils of the eye‐Volk lens‐slit‐lamp biomicroscope system. Conclusions All the parameters considered have marked effects on magnification. The ...
(Tokyo, Japan) operating at 10 kV to 15 kV. Various magnifications were employed during the SEM analysis, ranging from ×100 to ×10,000. The samples were attached to the sample holder with conductive copper tape and coated with gold/platinum by using the SC7620 Mini Sputter Coater/Glow ...
(Strehl ratio of 0.76 vs. 0.86 of a clear 24.5 D IOL at 3-mm aperture): (a)—opacified IOL optic and haptics seen against a bright background, (b)—photography in retroillumination against a dark background, (c)—under 20-fold magnification, evenly-distributed deposits can be visualized...
Offering a versatile focal length range from 28mm to 100mm, this lens excels in various shooting scenarios, from wide-angle landscapes to intimate close-ups. The T2.9 constant aperture ensures that you maintain consistent exposure and depth of field throughout the zoom range, allowing for ...