1. Introduction
Thank you for choosing the AstrHori 27mm F2.8 II APS-C Manual Lens. This compact and lightweight lens is designed for Canon EF-M mount mirrorless cameras, offering a versatile 27mm focal length and a bright F2.8 aperture. It is ideal for various photography styles, including portraits, street photography, food, and night scenes, providing excellent image quality and creative control through its manual focus design.
The AstrHori 27mm F2.8 II lens mounted on a compatible Canon EF-M camera body.
Overview of the AstrHori 27mm F2.8 II lens, emphasizing its F2.8 aperture.
2. Setup
2.1 Mounting the Lens
To attach the AstrHori 27mm F2.8 II lens to your Canon EF-M mirrorless camera:
- Align the red dot on the lens barrel with the red dot on your camera's lens mount.
- Gently insert the lens into the camera mount.
- Rotate the lens clockwise until it clicks into place, indicating it is securely locked.
The AstrHori 27mm F2.8 II lens correctly mounted on a Canon EF-M camera.
2.2 Camera Settings
Since this is a manual lens without electronic contacts, your camera needs to be configured to operate without a lens attached. Please follow these steps to enable the "Release without lens" function:
- Turn on your camera.
- Access the camera's menu system.
- Navigate to the Function settings or Custom Functions (C.Fn) menu.
- Locate the option related to "Release without lens" or "Shoot without lens".
- Set this option to "On".
Refer to your camera's specific instruction manual for exact menu navigation if needed.
Example camera menu screens for enabling "Release without lens" function.
3. Operation
3.1 Manual Focus
The AstrHori 27mm F2.8 II is a manual focus lens. To achieve sharp images:
- Look through your camera's viewfinder or LCD screen.
- Rotate the focus ring on the lens until your subject appears sharp.
- Utilize your camera's focus peaking or magnification assist features for precise focusing, especially with the wide F2.8 aperture.
The lens features an inner focus design, ensuring quiet operation and preventing dust intrusion, which contributes to image quality and extends lens lifespan.
Inner focus mechanism diagram.
3.2 Aperture Control
Adjust the aperture by rotating the aperture ring on the lens barrel. The F2.8 maximum aperture allows for:
- Shallow Depth of Field: Create pleasing background blur (bokeh) for portraits and subject isolation.
- Low Light Performance: Capture clear images in dimly lit environments without excessive ISO.
Sample images showcasing the lens's large aperture and image quality.
3.3 Filter Slot
The lens features a 55mm filter thread, allowing you to attach various filters such as UV, ND, and CPL filters to enhance your photography.
The lens with a filter attached, demonstrating the 55mm filter slot.
4. Maintenance
4.1 Cleaning the Lens
- Use a blower brush to remove dust from the lens surfaces.
- For smudges or fingerprints, use a clean microfiber cloth specifically designed for optics, along with a lens cleaning solution.
- Avoid touching the glass elements directly with your fingers.
- Do not use harsh chemicals or abrasive materials for cleaning.
4.2 Storage
- Store the lens in a dry, cool place, away from direct sunlight and extreme temperatures.
- Always attach the front and rear lens caps when not in use to protect the glass elements.
- If storing for extended periods, consider using a dehumidifying cabinet or silica gel packets to prevent mold growth.
5. Troubleshooting
5.1 Camera Does Not Recognize Lens / Cannot Take Photos
Symptom: The camera displays an error message like "Lens not attached" or prevents you from taking photos.
Solution: As this is a manual lens without electronic contacts, your camera needs to be set to "Release without lens" or "Shoot without lens". Refer to Section 2.2 for detailed instructions on how to enable this setting.
5.2 Images Are Out of Focus
Symptom: Photos appear blurry or not sharp.
Solution: Ensure you are manually focusing correctly. Rotate the focus ring until your subject is sharp in the viewfinder or on the LCD. Utilize your camera's focus peaking or magnification assist features for more accurate manual focusing. Practice is key to mastering manual focus.
6. Specifications
Optical structure of the lens (6 elements in 5 groups).
| Feature | Detail |
|---|---|
| Model Name | 27mm F2.8 II |
| Model Number | WFJT-2728EFMG-LD |
| Focal Length | 27mm |
| Maximum Aperture | F2.8 |
| Minimum Aperture | F16 |
| Lens Mount | Canon EF-M |
| Format Compatibility | APS-C |
| Optical Design | 6 Elements in 5 Groups |
| Angle of View | 59.2 Degrees |
| Minimum Focus Distance | 0.25m (0.82 ft) |
| Focus Type | Manual Focus |
| Filter Size | 55mm |
| Weight | Approx. 160g (0.35 lbs) |
| Dimensions (L x D) | Approx. 29mm x 57mm |
Lens dimensions and compatibility for Canon EF-M mount.
7. Warranty & Support
7.1 Warranty Information
The AstrHori 27mm F2.8 II APS-C Manual Lens comes with a standard manufacturer's warranty. Please retain your proof of purchase for warranty claims. The warranty covers manufacturing defects and malfunctions under normal use. It does not cover damage caused by misuse, accidents, unauthorized repairs, or normal wear and tear. For specific warranty terms and conditions, please refer to the documentation included with your product or contact AstrHori customer service.
7.2 Customer Support
For technical assistance, troubleshooting, or any questions regarding your AstrHori lens, please contact our customer support team.
- Email: support@astrori.com
- Website: www.astrori.com
When contacting support, please have your product model number (WFJT-2728EFMG-LD) and purchase date ready.