A camera takes a properly exposed photo at f/5.6 and 1/500 s. What shutter speed should be used if the lens is changed to f/4.0?
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A camera takes a properly exposed photo at f/5.6 and 1/500 s.
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What shutter speed should be used if the lens is changed to f/4.0?
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- A slide projector needs to create a 96-cm-high image of a 2.0-cm-tall slide. The screen is 310 cm from the slide. part a) What focal length does the lens need? Assume that it is a thin lens. part b) How far should you place the lens from the slide?Create a ray diagram for eyeglasses that contain a diverging lens. Assume you are looking at a 2 cm tall object that is 4 cm from the lens. The focal length is 3 cm. What type of vision are they used to correct? Give both names. How do they do this? Explain.A 1.00-cm-high object is placed 4.30 cm to the left of a converging lens of focal length 8.45 cm. A diverging lens of focal length -16.00 cm is 6.00 cm to the right of the converging lens. Find the position and height of the final image. position 188.8 height 26.048 X cm in front of the second lens X cm
- Example 2: Fixing the problem....simple optics. A person who is near-sighted has a far point of 460 cm from the eye. Assuming their glasses are to be worn 2.0 cm in front of their eye, find the focal length of the correcting lens needed so that they can see distant objects. Distant object Distant object IC ImageA camera is being used with a correct exposure at f/4 and a shutter speed of 1 15 s. In addition to more standard f-numbers, this camera has f-numbers f/1, f/1.4, and f/2. To photograph a rapidly moving subject, the shutter speed is changed to 1 240 s. Find the new f -number setting needed on this camera to maintain satisfactory exposure.f /A camera lens has a focal length of 35.0 mm. its f-stop setting range from f-1.4 to f-22. What is the maximum diameter of the aperture?
- 16.A nearsighted person has a far point of 25.3cm and is prescribed contact lenses to correct her vision. What lens strength (a.k.a., lens power), in Diopters, should be prescribed? Give your answer using the usual convention of positive values for converging lenses and negative values for diverging lenses.