Patent application number | Description | Published |
20080240709 | INTERCHANGEABLE LENS AND IMAGE PICKUP APPARATUS - An interchangeable lens mountable/detachable on/from a camera body is provided with a receiving unit that receives information on photography surroundings and a transmission unit that transmits data for correction of aberration based on the information received by the receiving unit, to the camera body. | 10-02-2008 |
20090046375 | ZOOM LENS AND IMAGE PICKUP APPARATUS - A zoom lens has, in order from the object side to the image side, a first lens unit that does not move during zooming and has positive refractive power, a second lens unit that performs zooming and has negative refractive power, a third lens unit that corrects image plane variation caused by zooming and has negative refractive power, and a fourth lens unit that does not move during zooming and has positive refractive power. The first lens unit has, in order from the object side to the image side, a first lens subunit that does not move during focusing and has negative refractive power, a second lens subunit that is configured to move along the optical axis during focusing and has positive refractive power, a third lens subunit that does not move during focusing and has positive refractive power. The second lens subunit has at least one aspherical lens surface AS | 02-19-2009 |
20110038056 | ZOOM LENS SYSTEM AND IMAGE PICKUP APPARATUS INCLUDING THE SAME - A zoom lens system includes, in order of from an object side to an image side: a first lens unit which does not move for zooming; a second lens unit moving during zooming; a third lens unit moving during zooming; and a fourth lens unit which does not move for zooming. The first lens unit includes a negative lens, a positive lens, a positive lens, and a positive lens, and when an Abbe number ν and a partial dispersion ratio θ of a material of the negative lens are denoted respectively by νn and θn, an average value of Abbe numbers ν and an average value of partial dispersion ratios θ of materials of the positive lenses are denoted respectively by νpa and θpa, and a refractive power of the negative lens is denoted by φn, the following expressions are satisfied: −1.75×10 | 02-17-2011 |
20110243539 | AUTOFOCUSING ZOOM LENS - In an autofocusing zoom lens, a depth of focus ε is obtained based on an aperture value Fno of a variable diaphragm and a diameter of a permissible circle of confusion δ. A focal position variation amount Δsk for a predetermined positional displacement amount ΔFp | 10-06-2011 |
20120262608 | ZOOM LENS AND IMAGE PICKUP APPARATUS INCLUDING THE SAME - A zoom lens includes a first lens unit having a positive refractive power which does not move for zooming; a second lens unit having a negative refractive power which moves during zooming; a third lens unit having a negative refractive power which moves during zooming; a fourth lens unit having a positive refractive power which moves during zooming; and a fifth lens unit having a positive refractive power which does not move for zooming. Air intervals (L | 10-18-2012 |
20120262798 | ZOOM LENS AND IMAGE PICKUP APPARATUS INCLUDING THE SAME - A zoom lens includes a first lens unit, a second lens unit, a third lens unit, a fourth lens unit and a fifth lens unit. In the zoom lens, air intervals L | 10-18-2012 |
20120262801 | ZOOM LENS AND IMAGE PICKUP APPARATUS INCLUDING THE SAME - A zoom lens includes, in order from an object side: a first lens unit having a positive refractive power which does not move for varying magnification; a second lens unit having a negative refractive power which moves for varying magnification; a third lens unit having a positive refractive power which moves for varying magnification; and a fourth lens unit having a positive refractive power which does not move for varying magnification, in which: the first lens unit includes a first sub lens unit which does not move for focusing and a second sub lens unit having a positive refractive power which moves for focusing; the first sub lens unit includes three lenses having negative, positive, and positive refractive powers; and each of the elements is appropriately set. | 10-18-2012 |
20120269500 | AUTOFOCUSING ZOOM LENS - In an autofocusing zoom lens, a depth of focus ε is obtained based on an aperture value Fno of a variable diaphragm and a diameter of a permissible circle of confusion δ. A focal position variation amount Δsk for a predetermined positional displacement amount ΔFp | 10-25-2012 |
20130113980 | ZOOM LENS AND IMAGE PICKUP APPARATUS INCLUDING THE SAME - A zoom lens including, in order from object side to image side: a first positive lens unit which does not move for zooming; a second negative lens unit which moves during zooming; a third positive lens unit which moves during zooming; a fourth lens unit which moves during zooming; and a fifth positive lens unit which does not move for zooming. The second unit passes through a point at which magnification of the second unit becomes −1 during zooming from wide-angle end to telephoto end, and −1<β34<−0.3, and 4.0<|m2/m3|<15 are satisfied where β34 represents a magnification of a combined unit including the third and fourth units at a zoom position fz at which the magnification of the second unit becomes −1, and m2 and m3 respectively represent displacements of the second and third units on optical axis at the zoom position fz with reference to the wide-angle end. | 05-09-2013 |
20130271630 | ZOOM LENS AND IMAGE PICKUP APPARATUS INCLUDING THE SAME - In a zoom lens including a positive first lens unit, negative second lens unit, positive third lens unit, and positive fourth lens unit, the fourth lens unit includes a 41 lens group, a 42 lens group, and a 43 lens group. the lateral magnification of the third lens unit at a wide-angle end when an infinite object is focused, the focal length of the fourth lens unit, the lens configuration length of the fourth lens unit, the air interval between the 41 and 42 lens groups, the air interval between the 42 and 43 lens groups, the focal length of the 42 lens group, the average values of the Abbe constants and partial dispersion ratios of positive lens of the 42 lens group, the average values of the Abbe constants and partial dispersion ratios of negative lenses of the 42 lens group, and the like are appropriately set. | 10-17-2013 |
20140049673 | ZOOM LENS AND IMAGE PICKUP APPARATUS INCLUDING THE SAME - A zoom lens includes, in order from an object side: a first positive lens unit not moving for zooming; a second negative lens unit moving during zooming; a third positive lens unit moving during zooming; a fourth positive lens unit moving during zooming; and a fifth positive lens unit not moving for zooming. Each of the lens units includes positive and negative lenses, and satisfies 10<νp−νn<54, −1<β2w<−0.05, −5<β2t<−1, and −1<β34z2<−0.3, where νp is average Abbe constant of the positive lens of the fourth unit, νn an average Abbe constant of the negative lens of the fourth unit, β2w a magnification of the second unit at wide angle end, β2t a magnification of the second unit at telephoto end, and β34z2 a magnification of a combined lens unit including the third and fourth unit at a zoom position where the magnification of the second unit is −1. | 02-20-2014 |
20140104467 | ZOOM LENS AND IMAGE PICKUP APPARATUS INCLUDING THE SAME - A zoom lens, including, in order from object side: a positive first unit which is fixed during zooming; a negative second unit which moves for zooming; a positive third unit which moves for zooming; a positive fourth unit which moves for zooming; and a positive fifth unit which is fixed during zooming, in which 1.5004-17-2014 | |