Single focal length lens system and image pickup apparatus using the same
A single focal length lens system and an image pickup apparatus using the same are provided. The single focal length lens system includes a front lens unit having a positive refractive power, and a rear lens unit in order from the object side to the image side along the optical axis. The front lens...
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Main Authors | , |
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Format | Patent |
Language | English |
Published |
29.04.2015
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Subjects | |
Online Access | Get full text |
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Summary: | A single focal length lens system and an image pickup apparatus using the same are provided. The single focal length lens system includes a front lens unit having a positive refractive power, and a rear lens unit in order from the object side to the image side along the optical axis. The front lens unit includes a first lens unit having a positive refractive power, a second lens unit having a negative refractive power, and a third lens unit having a positive refractive power in order from the object side to the image side, and both the first lens unit and the second lens unit include a positive lens and a negative lens. The rear lens unit includes a focusing lens unit and a first predetermined lens unit in order from the object side to the image side. The first predetermined lens unit has a refractive power having a sign different from a refractive power of the focusing lens unit, and does not move at the time of focusing. The front lens unit does not include a lens which moves, and the rear lens unit does not include a lens which moves except at the time of focusing. |
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Bibliography: | Application Number: CN20141561959 |