And the body of the microscope is constructed to allow for interchangeable eyepieces the monoculuar piece ( shown ) can easily be replaced with the binocular piece or a longer monocular eyepiece , a feature that is also made possible by powell and lealand 's unique tube design .

而镜身的构造也包含了可替换的目镜单筒目镜（如图所示）可以很方便地与双筒目镜和长单筒目镜进行替换，这一特点也得益于鲍威尔和李兰德的独一无二的镜筒设计。