Are there binoculars I don't have to adjust, that are always right?
Md Ariful Islam
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Dr. Md Rushad Rahman
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The reason you have to adjust is due to the object's distance that you are looking at. There are specific binoculars that don't require main focus adjustment but they are used for viewing objects far away. However, they say that if you adjust to see an object about a football field away that should be the permanent focus for the diopter adjustment.
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