According to diagrams like this the answer is no, because every part of the objective lens gives the whole image. But when I cover part of the objective lens of my binocular, I only see part of what I see without covering. This shows that the answer to the above is yes.
You have to account for the distance of the object from the lens. For the objective of a telescope the object is very small so covering it won't affect visuality. But for a binocular, (which is used for short distance) the coverage would affect the visuality. Try yourself by covering your eyes and seeing a nearby object and far away star in night.