Rotational alignment of interchangeable loupes

A loupe device for magnifying an object, the loupe device having a proximal end and a distal end and comprising:

• a frame comprising:
• a carrier lens;
• and
• an anchor assembly;
• and
• an interchangeable telescope assembly having a weight and defining a field-of-view plane, the interchangeable telescope assembly comprising at least one magnification lens and configured to mate with the anchor assembly, wherein mating of the interchangeable telescope assembly and the anchor assembly prevents rotation of the telescope assembly relative to the anchor assembly;
• wherein, upon a mating of the interchangeable telescope assembly and the anchor assembly:
• the interchangeable telescope assembly is held to the anchor assembly by magnetic attraction;
• and
• an indexing ring affixed to the interchangeable telescope assembly orients the interchangeable telescope assembly relative to the anchor assembly such that deviation of an optical axis of the telescope is oriented along a horizontal axis of the field-of-view-plane.

A loupe device for magnifying an object spaced apart from the loupe device, the loupe device comprising:

• an anchor assembly comprising:
• an anchor body having a first geometric feature;
• and
• a first magnetic element;
• and
• an interchangeable telescope assembly, comprising:
• a magnification lens;
• a second magnetic element;
• and
• an indexing ring comprising a second geometric feature configured to mate with the first geometric feature;
• wherein:
• the interchangeable telescope assembly is configured to be held to the anchor assembly by magnetic attraction between the first magnetic element and the second magnetic element;
• and
• the second geometric feature, when mated with the first geometric feature, rotationally fixes the interchangeable telescope assembly with respect to the anchor assembly.