1. Introduction
This manual provides detailed instructions for the proper setup, operation, and maintenance of your APEXEL 300X Phone Microscope Lens (Model MS300). Please read this manual thoroughly before using the product to ensure optimal performance and longevity.
2. What's in the Box
- APEXEL 300X Phone Microscope Lens
- Universal Phone Clip
- USB Type-C Charging Cable
- EVA Pads (for phone fit adjustment)
- Storage Bag
- Cleaning Cloth
- Instruction Manual (this document)

3. Setup and Installation
Follow these steps to properly attach the APEXEL 300X Microscope Lens to your smartphone:
- Prepare the Clip: If your phone requires a tighter fit, use the provided EVA pads to fill any gaps between the mobile phone lens and the clamp.
- Attach the Clip to Phone: Pull open the stretch clamp and carefully insert your mobile phone. Ensure the phone is securely held.
- Align the Lens: Loosen the top screw on the clamp. Slide the rail to align the microscope lens hole with your mobile phone's main camera lens. Precise alignment is crucial for clear images.
- Secure the Clamp: Tighten the top screw to secure the slider, ensuring the lens remains aligned.
- Install the Microscope: Directly insert the microscope unit into the slot on the clamp. A 'click' sound indicates that the installation is complete.

Compatibility
The universal phone clip design accommodates most smartphones with a width range of 71-105 mm (2.8-4.1 inches). This includes models from iPhone (excluding iPhone mini), Samsung, Google, Xiaomi, OnePlus, and others. Refer to Figure 3.2 for common iPhone camera locations.

Charging the Lens Unit
The microscope lens unit has a built-in 100mAh rechargeable battery, providing up to 5.5 hours of continuous use. Charge the unit using the provided USB Type-C cable. The charging port is located on the side of the lens unit.

4. Operating Instructions
The APEXEL 300X Microscope Lens transforms your smartphone into a powerful micro-observation tool. No additional app is required; simply use your phone's native camera application.
Magnification and Focusing
The lens provides 300X HD magnification. The optimal working distance between the lens and the subject is 6-10mm. To achieve focus, gently move the phone closer or further from the subject until the image appears clear. You may also need to adjust your phone's digital zoom (2-2.4X) to eliminate any black edges in the frame.

Built-in LED Lights and CPL Filter
The microscope lens features 12 high-bright LED lights with 13 lighting modes, including a 395nm UV light. These lights ensure clear and vivid images under various conditions. The integrated CPL filter helps reduce excessive reflections and glare, enhancing image detail.


Camera Settings for Optimal Use
For best results, it is recommended to disable your smartphone's native macro feature before using the APEXEL 300X lens. This ensures the microscope lens provides the primary magnification.
- For iOS (iPhone 13 and newer):
- Go to Settings.
- Select Camera.
- Turn on 'Macro Control'.
- Disable the macro function of your iPhone within the camera screen and use the main camera.
- For Samsung Galaxy (e.g., S23 Ultra):
- Open the camera app.
- Tap the close-up focus enhancement icon. When illuminated yellow, it is activated. Tap again to turn it off.

Product Videos
Video 4.1: APEXEL Upgraded 300X Phone Microscope Lens. This video demonstrates the features and usage of the APEXEL 300X Phone Microscope Lens, showcasing its magnification capabilities and ease of attachment to a smartphone.
Video 4.2: APEXEL 100X/150X/200X/3-IN-1 Phone Microscope Lens. This video provides a general overview of APEXEL's phone microscope lenses, demonstrating their application in observing various objects at different magnifications.
5. Maintenance
- Cleaning: Use the provided cleaning cloth to gently wipe the lens surfaces. Avoid using abrasive materials or harsh chemicals that could damage the optical coatings.
- Storage: When not in use, store the microscope lens in the provided storage bag to protect it from dust and scratches. Keep it in a cool, dry place away from direct sunlight.
- Battery Care: To prolong battery life, charge the lens unit regularly, even if not in frequent use. Avoid fully discharging the battery for extended periods.
6. Troubleshooting
- Blurry Images:
- Ensure the lens is perfectly aligned with your phone's main camera.
- Adjust the distance between the lens and the subject carefully to find the optimal focus (6-10mm).
- Disable your phone's native macro mode if it has one (refer to Section 4.3).
- Clean the lens surfaces with the provided cloth.
- Black Edges in Image:
- Use your phone's digital zoom function (typically 2-2.4X) to crop out the black edges (refer to Section 4.1).
- LED Light Not Working/Charging:
- Ensure the USB Type-C charging cable is securely connected to the lens unit and a power source.
- Verify the power button on the lens unit is pressed and held for 2 seconds to turn on the lights. Cycle through lighting modes by short pressing the mode button.
- If the light still does not work after charging, contact customer support.
- Lens Not Fitting Securely:
- Use the provided EVA pads to create a snug fit between your phone and the universal clip.
- Remove any bulky phone cases that might interfere with the clip's grip or lens alignment.
7. Specifications
| Feature | Specification |
|---|---|
| Model Number | MS300 |
| Magnification | 300X |
| Optimal Working Distance | 6-10mm |
| Focal Length Description | 5.4~6.8MM |
| Lens Type | Macro |
| Built-in LED Lights | 12 high-bright LEDs, 13 lighting modes (including 395nm UV light) |
| CPL Filter | Integrated for glare reduction |
| Battery Capacity | 100mAh (rechargeable) |
| Continuous Use Time | Up to 5.5 hours |
| Charging Interface | USB Type-C |
| Item Weight | 46.5g (1.7oz) |
| Product Dimensions | 3.31 x 3.85 x 3.85 inches |
| Compatible Mountings | Android/iPhone (71-105mm width) |
8. Warranty and Support
For warranty information and customer support, please refer to the official APEXEL website or contact the seller directly. Details regarding specific warranty periods and service procedures are typically provided at the point of purchase or on the manufacturer's official channels.





