With ST adapter, so you can check ST connector endface.

With regular battery. Without power adapter

The OFS 300 is a versatile instrument for the inspection of optical fiber connectors. By employing universal adapter cap mount, it can inspect virtually any connector style for scratches, dirt, or other problems normally associated with poor transmission performance.

Tip: If the image is not at the center, you may adjust three screws under adapter.

Noyes OFS-300 normally already includes KG3 safety filter to cut 1.0-1.6um light. If fiber is launched with invisible telecom 850nm/980nm light, we highly recommend you buy this fiber scope kit which already installs IR-cut filter BG39 (cut 0.73-1.1um) inside the fiber scope.

Note: It is not safe enough if there is high power laser inside fiber.