Image forming lens system and image pickup apparatus using the same
An image forming lens system includes a front lens unit having a positive refractive power, and a rear lens unit, and does not include any other lens unit. The front lens unit includes a first lens unit having a positive refractive power and a second lens unit having a negative refractive power. Eac...
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Main Authors | , , |
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Format | Patent |
Language | English |
Published |
17.04.2018
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Subjects | |
Online Access | Get full text |
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Summary: | An image forming lens system includes a front lens unit having a positive refractive power, and a rear lens unit, and does not include any other lens unit. The front lens unit includes a first lens unit having a positive refractive power and a second lens unit having a negative refractive power. Each of the first lens unit and the second lens unit includes a positive lens and a negative lens. The second lens unit is a focusing lens unit. The rear lens unit includes a positive lens and a negative lens. The second lens unit is the only lens unit that moves, in the front lens unit, and the following conditional expressions (1) and (2′) are satisfied: 0.5<fFF/f<1.65 (1) 0≦|f/rG2b|<6.5 (2′). |
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Bibliography: | Application Number: US201615189439 |