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Telescopic sights based on image erector lenses (used to present to the user with an upright image) have two planes of focus where a reticle can be placed: at the focal plane between the objective and the image erector lens system (the First Focal Plane (FFP)), or the focal plane between the image erector lens system and the eyepiece (the ...
To set range the dial adjusts the reticle size to match target wingspan. Currently set to the Junkers Ju 88 , it ranged in size from the large Fw 200 Condor to the small Messerschmitt Bf 109 . A gyro gunsight (G.G.S.) is a modification of the non-magnifying reflector sight in which target lead (the amount of aim-off in front of a moving target ...
A view through the Mark III Free Gun Reflector Sight, first produced in 1943, used on British army guns, naval guns, and as a pilot sight and a defensive gun sight on aircraft. The reticle image in this sight is produced by an optical collimator bounced off a beam splitter.
This sight combined the images of the radar and a lens system in front of the aircraft, allowing them to be directly compared at once through a binocular eyepiece. [ 45 ] Bombsights on older aircraft, like the Boeing B-29 Superfortress and the later B-50 , were left in their wartime state.
The Stinger reticle is very different in that it is a rear-mounted illuminated reticle -the reticle is built into the tube and positioned on top of the screen so both the screen and reticle are in focus. It also allows red-on-green illumination which makes the reticle stand out.
Reticles have other features such as a bullet drop compensator and other different reticle shapes such as chevrons. Some ACOG models incorporate rudimentary ghost ring iron sights as a backup for targets that are within 50 m (55 yd). Most ACOG models, when mounted to a carry handle, have an open space through the mount to allow the use of the ...