Because the viewfinder and the film lens cannot share the same optical path, the viewing lens is aimed to intersect with the film lens at a fixed point somewhere in front of the camera.

Because the position of the exit pupil usually is unknown to the user of a lens, the rear conjugate focal distance is used instead ; the resultant theoretical error so introduced is insignificant with most types of photographic lenses.

Because lens design only allowed rather small aperture lenses, the image on the ground glass screen was faint and most photographers had a dark cloth to cover their heads to allow focussing and composition to be carried out more easily.

Because of its power to reveal the previously hidden diversity of microscopic life, metagenomics offers a powerful lens for viewing the microbial world that has the potential to revolutionize understanding of the entire living world.

Because of the excess sugar alcohol ( polyol ), the lens imbibes water, causing osmotic imbalance.

Because silicone allows more oxygen permeability than water, the oxygen permeability of silicone hydrogels is not tied to the water content of the lens.

Because of its wide angle lens it is possible to make very precise measurements of atmospheric effects on how emissions from the Earth's surface propagate.

Because of the inability to adjust focus, the small lens aperture and the low sensitivity of the sensitive materials available, these cameras work best in brightly lit daylit scenes when the subject is within the hyperfocal distance for the lens and of subjects that move little during the exposure -- snapshots.

Because the second take was filmed with a wider lens, a vague outline of the alien could be seen with the background scenery bending around its shape.

Because of flaws in its design, such as the shape of the lens and the narrow field of view, the images were blurry and distorted.

Because of the paralysis of the ciliary muscle in the eye, the curvature of the lens can no longer be adjusted to focus on nearby objects.

Because the light rays are parallel the lens of the human eye focusses on infinity to get a clear image.

Because Huygens eyepieces do not contain cement to hold the lens elements, telescope users sometimes use these eyepieces in the role of " solar projection ", i. e. projecting an image of the Sun onto a screen.

Because of its durability and access to the Nikkor lens line, the FM came to dominate its market niche and was rewarded by the introduction of an improved successor, the Nikon FM2, in 1982.

Because a matching filter on the camera lens screens out only the backing color, the background area records as black, which, on the camera ’ s negative film, will develop clear ( fig.

Because of the increased equatorial zonular tension on the lens during accommodation, the stress on the lens capsule is increased and the lens remains stable and unaffected by gravity.

Because of its ability to reveal the previously hidden diversity of microscopic life, metagenomics offers a powerful lens for viewing the microbial world that has the potential to revolutionize understanding of the entire living world.

Because of a missile's ballistic trajectory, the location of a fixed target must be known quite accurately.

Because of their high reactivity, they must be stored under oil in sealed glass ampoules to prevent reaction with air.

Because of the seemingly highly symbolic and even cryptic language of this one New Testament passage, some Christian scholars conclude that Mount Armageddon must be an idealized location.

Because Bessel's equation becomes Hermitian ( self-adjoint ) if it is divided by x, the solutions must satisfy an orthogonality relationship for appropriate boundary conditions.

Because water is incompressible and must remain within the confines of the bucket, this outward movement increases the depth of water at the larger radius, increasing the height of the surface at larger radius, and lowering it at smaller radius.

Because society needs people to do computing well, we must think of computing not only as a profession but also as a discipline.

Because the number of days in the tropical year is not a whole number, a solar calendar must have a different number of days in different years.

Because the islands cannot produce enough goods to support the population, about 90 % of their food and consumer goods must be imported.

Because acids were thought at the time to necessarily contain oxygen, a number of chemists, including Claude Berthollet, suggested that Scheele's dephlogisticated muriatic acid air must be a combination of oxygen and the yet undiscovered element, and Scheele named the supposed new element within this oxide as muriaticum.

Because the functions f ( g ( x )) and x are equal, their derivatives must be equal.

Because the poor people are upset by this, from now on, Musuluman Huihui and Zhuhu Huihui, no matter who kills animal will eat and must cease slaughtering sheep themselves, and cease the rite of circumcision.

Because of their physical similarity to humans a replicant must be detected by its lack of emotional responses and empathy to questions posed in a Voight-Kampff test.

Because only a fraction of the cells in a tumor die with each treatment ( fractional kill ), repeated doses must be administered to continue to reduce the size of the tumor.

Because compressed data must be decompressed to be used, this extra processing imposes computational or other costs through decompression, this situation is far from being a free lunch.

Because the DHCP protocol must work correctly even before DHCP clients have been configured, the DHCP server and DHCP client must be connected to the same network link.

Because DOM supports navigation in any direction ( e. g., parent and previous sibling ) and allows for arbitrary modifications, an implementation must at least buffer the document that has been read so far ( or some parsed form of it ).

Because of this a quadratic equation must contain the term, which is known as the quadratic term.

Because a phocid mother's feeding grounds are often hundreds of kilometers from the breeding site, she must fast while lactating.

Because the territory of a particular country must be the same color, four colors may not be sufficient.

Because of the strong empirical support for special relativity, any modifications to it must necessarily be quite subtle and difficult to measure.

Because of this necessity to have relations with other rational beings in order to achieve consciousness, Fichte writes that there must be a ' relation of right ,' in which there is a mutual recognition of rationality by both parties.

Because Sections 3 ( c ) 1 and 3 ( c ) 7 of the Investment Company Act of 1940 prohibit hedge funds from making public offerings, funds must sell their securities in accordance with the private offering rules under the Securities Act of 1933.

Because communication devices using the ISM bands must tolerate any interference from ISM equipment, unlicensed operations are typically permitted to use these bands, since unlicensed operation typically needs to be tolerant of interference from other devices anyway.

Because of the " Single Market " of the EC, any food – even if irradiated – must be allowed to be marketed in any other Member State even if a general ban of food irradiation prevails, under the condition that the food has been irradiated legally in the state of origin.