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Although and lens
Although the Fresnel lens was invented in 1822, it was not used in the U. S. until the 1850s due to the parsimonious administrator of the United States lighthouse establishment, Stephen Pleasonton.
Although a Dutch spectacle maker created the compound lens and inserted it in a microscope around the turn of the seventeenth century, and Galileo had applied the principle of the compound lens to the making of his microscope patented in 1609, its possibilities as a microscope had remained unexploited for half a century, until Robert Hooke improved the instrument.
Although named after Dutch astronomer Willebrord Snellius ( 1580 – 1626 ), the law was first accurately described by the Arab scientist Ibn Sahl at Baghdad court, when in 984 he used the law to derive lens shapes that focus light with no geometric aberrations in the manuscript On Burning Mirrors and Lenses ( 984 ).
Although all the above lens types — sclerals, PMMA lenses and RGPs — could be correctly referred to as being " hard " or " rigid ", the term hard is now used to refer to the original PMMA lenses, which are still occasionally fitted and worn, whereas rigid is a generic term that can be used for all these lens types: hard lenses ( PMMA lenses ) are a sub-set of rigid lenses.
Although the lens does not restore normal color vision, it allows some colorblind individuals to distinguish colors better.
Although many brands of contact lenses are lightly tinted to make them easier to handle, cosmetic lenses worn to change the color of the eye are far less common, accounting for only 3 % of contact lens fits in 2004.
Although the materials are the same, the manufacturing processes by which the respective contact lenses are made is what differentiates a " daily disposable " lens from a lens recommended for two-week or 4-week replacement.
Although they have less flexibility than monorail cameras, modern field cameras tend to have most camera movements for the front standard, i. e. lens rise / fall / shift / tilt / swing, but are usually more limited in back movements, sometimes having only tilt / swing.
Although many cameras of the mid nineteenth century were wooden and " boxy " in appearance with a brass fitted lens on the front they should not be confused with the mass produced box cameras that exploded in popularity after the introduction of the first Kodak.
Although the lenses appear similar in layout, there is a lot more to the design and performance of a lens than simply the layout of the glass elements.
Although this means that it is not possible to focus the beams nearly as tightly as for light, it also means that the aperture or " capture area " of even the simplest, omni-directional antenna is greatly larger than that of a lens in any feasible optical system.
Although the camera was capable of ' capturing ' motion, it wasn't a complete success because each lens photographed the subject from a slightly different viewpoint and thus the projected image jumped about.
Although the optical format size bears no relationship to any physical parameter of the sensor, its use means that a lens that would have been used with ( say ) a four thirds inch camera tube will give roughly the same angle of view when used with a solid state sensor with an optical format of four thirds inch.
Although Frazier reshot the footage in question with the FrazierPanavision lens the patent was declared unenforceable for inequitable conduct and attorney's fees were awarded to the defendants.
Although the Nikon F3AF ( 1983 ), Pentax ME F and Chinon CE-5 already had presented autofocus single lens reflex cameras, autofocusing could not be achieved without the use of special motorised AF lenses.
Although eye-cups can usually be folded down to allow the spectacle wearer to get closer to binocular eyepieces, there are sometimes lens mountings that do not allow the theoretical eye relief to be obtained.
Although slower, this lens introduced improvements such as optical image stabilisation, a higher zoom range ( 6 ×), and a macro mode that would focus as close as 1 cm.
Although there is no clear beginning or end of a microlensing event, by convention the event is said to last while the angular separation between the source and lens is less than.
Although distortion can be irregular or follow many patterns, the most commonly encountered distortions are radially symmetric, or approximately so, arising from the symmetry of a photographic lens.
Although Night Man has no other superhuman powers on his own, he owns a special bulletproof bodysuit that gives him several abilities, including flight, holographic camouflage-style invisibility and advanced sight functions through the round red lens over his left eye including the ability to see in the dark and fire a laser beam.

Although and can
Although they are forbidden to sit with the customers, the dancers are sometimes proffered drinks, and most of them can bolt one down in mid-shimmy.
Although the Af calculation is obvious by analogy with that for gravitational field and osmotic pressure, it is interesting to confirm it by a method which can be generalized to include related effects.
Although no national norms exist for the social development of children, the teacher can find a great deal of information concerning types of social behavior normally displayed by children at various age levels.
Although the first polyether foams on the market had to be produced by the two-step prepolymer method, today, thanks to new catalysts, they can be produced by a one-shot technique.
Although a complete picture cannot be given, we can indicate some aspects of life into which the Christian faith entered as at least one creative factor.
Although human morphology is not necessarily the ideal form for working robots, the fascination in developing robots that can mimic it can be found historically in the assimilation of two concepts: simulacra ( devices that exhibit likeness ) and automata ( devices that have independence ).
Although digital setting circles can be used to display a telescope's RA and Dec coordinates, they are not simply a digital read-out of what can be seen on the telescope's analog setting circles.
Although the neutral ground-state chemical compounds of argon are presently limited to HArF, argon can form clathrates with water when atoms of it are trapped in a lattice of the water molecules.
Although hydrogen-like orbitals are still used as pedagogical tools, the advent of computers has made STOs preferable for atoms and diatomic molecules since combinations of STOs can replace the nodes in hydrogen-like atomic orbital.
Although not as accurate by themselves as STOs, combinations of many Gaussians can attain the accuracy of hydrogen-like orbitals.
Although the terms adiabatic and isocaloric can often be interchanged, adiabatic processes may be considered a subset of isocaloric processes ; the remaining complement subset of isocaloric processes being processes where net heat transfer does not diverge regionally such as in an idealized case with mediums of infinite thermal conductivity or non-existent thermal capacity.
Although agates may be found in various kinds of rock, they are classically associated with volcanic rocks and can be common in certain metamorphic rocks.
Although programs can alter the position of the screen in memory, the non-linear format of the display means that vertical scrolling can only be done in blocks of 8 pixels without further work.
Although such a conversion can be prone to loss, most modern audio systems use this approach as the techniques of digital signal processing are much more powerful and efficient than analog domain signal processing.
Although sometimes this energy is released in the form of an emitted photon, the energy can also be transferred to another electron, which is ejected from the atom.
* Conservation of Energy: Although energy can be converted from one form to another, the total energy in a given closed system remains constant.
Although colors can be mixed, pigments are often not specified.
Although some plants do prefer slightly basic soil ( including vegetables like cabbage and fodder like buffalograss ), most plants prefer a mildly acidic soil ( pH between 6. 0 and 6. 8 ), and alkaline soils can cause problems.
Although AVMs are often associated with the brain and spinal cord, they can develop in any part of the body.
Although oxidation reactions are crucial for life, they can also be damaging ; plants and animals maintain complex systems of multiple types of antioxidants, such as glutathione, vitamin C, and vitamin E as well as enzymes such as catalase, superoxide dismutase and various peroxidases.
Although integration is the primary purpose of these organizations, they also serve as forums in which Brazil can exercise its leadership and develop consensus around its positions on regional and global issues.
Although black is sometimes described as an " achromatic ", or hueless, color, in practice it can be considered a color, as in expressions like " black cat " or " black paint ".

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