no its definatly not field of view, ive been messing with optical devices for over 20 years,and use a measuring device at a set distance,where ,the magnified image will fit inside a given measured gap, but you have to have both eyes open to see / kind of like a red dot sight,, where the other eye helps superimpose the chart,its very accurate,// anyhow il see how my scope fares on my new hw 97.all the best chaps.