Zoom lens assembly

A video camera comprising:

• a zoom lens assembly including a first lens group having a positive refractive power and fixed relative to an image plane, a second lens group having a negative refractive power, said second lens group being movable along an optical axis of the zoom lens assembly to effect a variation of image magnification, a third lens group having a positive refractive power and a light condensing function, said third lens group being fixed relative to the image plane, and a fourth lens group having a positive refractive power and being movable along the optical axis to keep the image plane, which would displace as a result of movement of the second lens group and that of an object to be photographed, at a predetermined position spaced from a reference plane, and wherein the first lens group includes a negative lens, a positive lens and a positive meniscus lens in succession from the object side, wherein the second lens group includes a negative meniscus lens, a negative lens and a positive lens in succession from the object side, wherein the third lens group has at least one aspherical surface and includes a positive lens and a negative lens in succession from the object side, and wherein the fourth lens group includes at least one aspherical surface, and a negative lens and a positive lens in succession from the object side, said negative and positive lenses of said fourth lens group being cemented together;
• an imaging element;
• a signal processing circuit;
• and a viewfinder.