The exposure index EI for a 35 millimeter camera is a measurement of the amount of light that hits the film. It is determined by the equation EI = log2 (16/2) where f is the "f-stop" setting on the camera, and t is the exposure time in seconds. Suppose the f-stop setting is 4 and the desired exposure time is 2 seconds. What will the resulting exposure index be EI=___

The exposure index EI for a 35 millimeter camera is a measurement of the amount of light that hits the film. It is determined by the equation EI = log2 (16/2) where f is the "f-stop" setting on the camera, and t is the exposure time in seconds. Suppose the f-stop setting is 4 and the desired exposure time is 2 seconds. What will the resulting exposure index be EI=___

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter27: Wave Optics

Section: Chapter Questions

Problem 13OQ: Why is it advantageous to use a large-diameter objective lens in a telescope? (a) It diffracts the...

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A CCD camera is equipped with a lens with constant focal - length. As the f - number is decreased, determine whether the following quantities increase, decrease, or remain unchanged. Indicate your answers with I, D, or U. (a) the aperture (b) the depth of field (c) the intensity of light reaching the sensor (d) the appropriate exposure time
An aerial camera with forward motion compensation and a 6-inch focal length is carried in an airplane travelling at 124.30 miles per hour. The flying height above the average terrain is 11485 feet and exposure time is 1/500 seconds. c) Calculate the distance, in microns, that the film must be move across the focal plane during exposure in order to obtain a clear 1mage.
A lens has a focal length of 28 cm and a diameter of 4.0 cm. What is the f - number of the lens?
If, when using 10X ocular and a 50X objective, the field size is 2.4 mm. The approximate field size with a 25X objective is ________ mm. 9.6 0.4 4.8 1.2
The resolution of a TEM is limited by diffraction (Rd) as discussed in Chapter 1, Eq. (1.3)), and by the spherical aberration which is expressed as: Rsph =Csα3, where Cs is the spherical aberration coefficient and α is the half-angle of the cone of light entering the objective lens. The TEM resolution is the quadratic sum of the diffraction resolution and spherical aberration resolution, given by the expression: R=√(R_d^2 + R_sph^2 ) The minimum R is obtained when Rd ≅ Rsph. Estimate the optimum value of α and resolution limit of TEM at 100–200 kV. (Cs ≅ 1 mm for an electromagnetic objective lens).
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A certain camera has f-numbers that range from 1.7 to 19. If the focal length of the lens is 56 mm, what is the range of aperture diameters for the camera?Dmin = ?? mmDmax = ?? mm
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If you wear glasses, did you know that each lens has a measurement called its focal length, f? When an object is in focus, its distance from the lens, p, and the distance from the lens to your retina, q,satisfy the formula 1/p +1/q =1/f Solve this formula for p.