Introduction
Thank you for choosing the Meike 50mm F1.8 Full Frame AF STM Lens. This manual provides essential information for the proper setup, operation, and maintenance of your new lens. Please read this manual thoroughly before using the product to ensure optimal performance and longevity.
Key Features
- Focal Length: 50mm fixed prime lens.
- Aperture: Wide F1.8 aperture for excellent low-light performance and smooth background blur.
- Autofocus: Equipped with an AF STM (Stepping Motor) for fast, quiet, and precise autofocus.
- Compatibility: Designed for Sony E mount full-frame mirrorless cameras (e.g., A9, A7III, A7II, A7, A7R3, A7R4 series) and compatible with APS-C cameras (e.g., A6500, A6400, A6300, A6000).
- Optical Design: Features 11 elements in 7 groups for sharp image delivery.
- Firmware Updates: Includes a Type-C interface for convenient firmware updates.
Package Contents
Verify that all items are present in your package:
- Meike 50mm F1.8 AF STM Lens
- Front Lens Cap
- Rear Lens Cap
- Lens Hood
- Instruction Manual
Figure 1: Meike 50mm F1.8 lens with its front cap, rear cap, and lens hood.
Setup
Attaching the Lens to Your Camera
- Ensure your camera is powered off.
- Remove the rear lens cap from the Meike 50mm F1.8 lens and the body cap from your camera.
- Align the red dot on the lens barrel with the corresponding red dot on your camera's lens mount.
- Gently insert the lens into the camera mount and rotate it clockwise until it clicks into place. Do not force the lens.
Figure 2: The Meike 50mm F1.8 lens securely attached to a Sony E-mount camera body.
AF/MF Switch
The lens features an AF/MF switch on its barrel, allowing you to quickly toggle between autofocus and manual focus modes. Slide the switch to 'AF' for autofocus or 'MF' for manual focus, depending on your shooting requirements.
Figure 3: The AF/MF switch for selecting focus mode.
Firmware Updates
The Meike 50mm F1.8 lens is equipped with a Type-C USB port for firmware updates. This ensures your lens remains compatible with the latest camera technologies and receives performance enhancements. Firmware updates are currently supported only on Android devices. Please visit the official Meike website for the latest firmware downloads and detailed update instructions.
Operating the Lens
Autofocus (AF)
In AF mode, the lens utilizes its STM (Stepping Motor) to achieve fast and quiet focusing. This is ideal for both photography and video recording where silent operation is crucial. The lens supports various camera autofocus features, including Eye AF, for precise subject tracking.
Manual Focus (MF)
In MF mode, you can precisely adjust focus by rotating the focus ring on the lens barrel. This mode is beneficial for situations requiring fine control over focus, such as macro photography or specific creative effects.
Aperture Control
The F1.8 wide aperture allows for significant light gathering, making the lens suitable for low-light conditions. It also enables a shallow depth of field, producing a pleasing background blur (bokeh) that isolates your subject effectively. The lens features 9 aperture blades for smooth, circular bokeh.
Figure 4: The lens's front element and its nine-blade aperture design.
Maintenance
Proper care and maintenance will extend the life and performance of your lens.
- Cleaning: Use a soft, lint-free cloth to clean the lens barrel. For lens elements, use a specialized lens cleaning solution and a microfiber cloth. Avoid touching the glass surfaces with your fingers.
- Storage: Store the lens in a dry, cool place away from direct sunlight and extreme temperatures. Use the front and rear lens caps when not in use to protect the elements.
- Handling: Avoid dropping or subjecting the lens to strong impacts.
Troubleshooting
Autofocus Failure
If you experience issues with autofocus, ensure the AF/MF switch is set to 'AF'. If the problem persists, check the Meike official website for any available firmware updates for your lens model. Updating the firmware can often resolve compatibility or performance issues.
Specifications
| Feature | Specification |
|---|---|
| Brand | Meike |
| Model Number | Meike 50mm F1.8 E |
| Focal Length | 50mm |
| Maximum Aperture | F1.8 |
| Lens Type | Standard Prime Lens |
| Compatible Mountings | Sony E |
| Lens Construction | 11 elements in 7 groups |
| Minimum Focus Distance | 0.63 meters (2.06 feet) |
| Filter Size | 58mm |
| Item Weight | 10.6 ounces (approx. 300g) |
| Product Dimensions | 1 x 1 x 1 inches (approximate) |
Figure 5: Modulation Transfer Function (MTF) chart illustrating lens performance.
Figure 6: Optical diagram of the lens elements.
Warranty and Support
For warranty information, technical support, and the latest product updates, please visit the official Meike website or contact their customer service. Keep your purchase receipt as proof of purchase for warranty claims.
