A viewing optic comprising: a body having an objective lens system at one end configured to focus a target image from an outward scene, an ocular lens system at the other end of the body and a movable erector tube with an erector lens system located between the objective and ocular lens systems, the erector lens system, the objective lens system and the ocular lens system forming a first optical system having a first focal plane and a second focal plane, with a first reticle at the first focal plane that moves in conjunction with the movable erector tube; wherein the first focal plane is the back focal plane of the objective lens system and the second focal plane is the back focal plane of the erector lens system; a beam combiner located between the first focal plane and the objective lens system; a magnification ring coupled to an external portion of the body and configured to provide magnification adjustment by changing the position of zoom lenses located in the erector lens system; an active display for generating an image and a collector lens system configured to collect light from the active display, where the collector lens system has an inner lens cell and an outer lens cell, the inner lens cell having an asphere and the outer lens cell having a doublet lens and a singlet lens, with the singlet lens being the furthest from the active display, and further wherein the collector lens system is positioned between the active display and a reflective material, the reflective material configured to direct the generated image from the active display to the beam combiner, wherein the image from the active display and the target image from the objective lens system are combined into the first focal plane and viewed simultaneously; and a magnification tracking system configured to scale the generated image from the active display upon adjustment of the magnification ring. a body having an objective lens system at one end configured to focus a target image from an outward scene, an ocular lens system at the other end of the body and a movable erector tube with an erector lens system located between the objective and ocular lens systems, the erector lens system, the objective lens system and the ocular lens system forming a first optical system having a first focal plane and a second focal plane, with a first reticle at the first focal plane that moves in conjunction with the movable erector tube; wherein the first focal plane is the back focal plane of the objective lens system and the second focal plane is the back focal plane of the erector lens system; a beam combiner located between the first focal plane and the objective lens system; a magnification ring coupled to an external portion of the body and configured to provide magnification adjustment by changing the position of zoom lenses located in the erector lens system; an active display for generating an image and a collector lens system configured to collect light from the active display, where the collector lens system has an inner lens cell and an outer lens cell, the inner lens cell having an asphere and the outer lens cell having a doublet lens and a singlet lens, with the singlet lens being the furthest from the active display, and further wherein the collector lens system is positioned between the active display and a reflective material, the reflective material configured to direct the generated image from the active display to the beam combiner, wherein the image from the active display and the target image from the objective lens system are combined into the first focal plane and viewed simultaneously; and a magnification tracking system configured to scale the generated image from the active display upon adjustment of the magnification ring.