1. Introduction
The SIRUI Aurora 85mm F1.4 Full Frame Auto Focus Lens is a telephoto prime portrait lens designed for L Mount cameras. It offers a fast F1.4 aperture and advanced optical design for high-quality imaging.
Key Features:
- Unparalleled Image Quality: Provides sharpness across the frame, even at F1.4, with suppressed chromatic aberration and authentic color rendering through aspherical, ED, and HRI glass elements.
- Ultra Fast Aperture: The F1.4 aperture and fifteen-blade diaphragm ensure excellent low-light performance and produce smooth, dreamy bokeh.
- Fast, Smooth & Precise AF: Equipped with a step motor for accurate and smooth autofocus, supporting Eye AF and object tracking for dynamic subjects.
- King of Portrait: The 85mm focal length is ideal for natural facial shots, offering a moderate working distance and creamy bokeh for portrait photography.
- Super Lightweight: Optimized lens structure reduces weight to approximately 540g (1.2 lbs), making it suitable for extended handheld or gimbal use.

Product Overview Video:
2. Safety Precautions
- Do not expose the lens to direct sunlight for extended periods, as this may damage the camera sensor.
- Avoid dropping or subjecting the lens to strong impacts.
- Keep the lens away from water and moisture. While the lens is splash-resistant, it is not waterproof.
- Do not attempt to disassemble or repair the lens yourself. Contact authorized service personnel for repairs.
- Store the lens in a dry, cool place, away from extreme temperatures and humidity.
3. Lens Components and Package Contents
Package Contents:
Upon opening the package, ensure all the following items are present:
- Lens Body
- Storage Bag
- Lens Box
- Lens Hood
- Service Card & Warranty Card

Lens Overview:
Familiarize yourself with the main parts of the lens:
- Focus Ring: Used for manual focusing.
- Aperture Ring: Controls the lens aperture (F-stop). Features a switch for clickable or de-clickable operation.
- AF/MF Switch: Toggles between autofocus and manual focus modes.
- AFL Button: An assignable function button, typically used for focus lock (compatible with E/L/Z mounts).
- Front Filter Thread (M67 x 0.75): For attaching filters and lens caps.


4. Setup
Attaching the Lens:
- Ensure your camera is turned off.
- Align the mounting index on the lens with the corresponding index on your camera body.
- Insert the lens into the camera mount and rotate it clockwise until it clicks into place.
Detaching the Lens:
- Ensure your camera is turned off.
- Press and hold the lens release button on your camera body.
- Rotate the lens counter-clockwise until it detaches from the camera body.
Compatible Cameras (L-Mount):
This lens is designed for L Mount cameras. Compatible models include:
- Lumix DC-S5
- Lumix DC-S5M2
- Lumix DC-S9
- Lumix DC-S1
- Lumix DC-S1H
- Lumix DC-S1R
- Sigma FP
- Sigma FPL
- Leica SL1
- Leica CL

5. Operating the Lens
Focusing Modes (AF/MF):
The lens features an AF/MF switch to select between autofocus and manual focus. In autofocus mode, the lens utilizes a step motor for fast and precise focusing, including Eye AF and object tracking capabilities.

Aperture Control:
The F1.4 maximum aperture allows for significant background blur (bokeh) and excellent performance in low-light conditions. The aperture ring can be switched between a clickable mode for tactile feedback or a de-clickable mode for smooth, silent adjustments during video recording.

AFL Button:
The AFL button on the lens can be customized via your camera's settings. Its primary function is to lock focus, preventing accidental refocusing after achieving desired sharpness. This feature is compatible with E, L, and Z mount camera bodies.

Creative Use Video:
6. Maintenance
Cleaning the Lens:
- Use a soft, lint-free cloth or a lens brush to remove dust from the lens surface.
- For stubborn smudges, use a lens cleaning solution specifically designed for optical elements and apply it to a microfiber cloth, not directly to the lens.
- Avoid touching the lens elements with your fingers.
Storage:
- Always attach the front and rear lens caps when not in use to protect the lens elements.
- Store the lens in its provided storage bag or a padded camera bag to prevent scratches and impacts.
- If storing for an extended period, consider using a desiccant to prevent mold and mildew growth, especially in humid environments.
Dust and Splash Resistance:
The SIRUI Aurora 85mm F1.4 lens features a dust and splash-resistant design. This construction allows for use in light rain or dusty conditions, providing enhanced durability. However, it is not fully waterproof and should not be submerged in water.

7. Troubleshooting
Common Issues and Solutions:
- Lens not recognized by camera: Ensure the lens is securely mounted and the camera is turned on. Check camera settings for lens detection.
- Autofocus not working: Verify the AF/MF switch on the lens is set to AF. Check camera's focus mode settings. Ensure there is sufficient light and contrast for the autofocus system to operate effectively.
- Image quality issues (e.g., soft focus, chromatic aberration): Ensure the lens elements are clean. Check that the aperture is set appropriately for your shooting conditions. While the lens is designed to minimize aberrations, some may be present, especially at wide apertures or in challenging lighting.
- Aperture ring not clicking: Check the 'Click ON/OFF' switch on the lens. Set it to 'ON' for clickable aperture stops.
Firmware Update Notice:
The latest firmware version for the Aurora 85mm lens is 85mm F1.4 VER2.2. For assistance with firmware updates or any other technical issues, please contact SIRUI USA support.
8. Specifications
| Feature | Detail |
|---|---|
| Model | AF 85mm F1.4 FF |
| Focal Length | 85mm |
| Max Aperture | F1.4 |
| Min Aperture | F16 |
| Focus Type | Autofocus, Manual Focus |
| Lens Structure | 14 Elements in 9 Groups |
| Aperture Blades | 15 |
| Max Magnification | 1:8.68 or 0.1152x |
| Filter Thread | M67 x 0.75 |
| Shooting Distance | 0.85m (2.79ft) ~ ∞ |
| FOV (Diagonal) | 28.64° |
| FOV (Horizontal) | 24.02° |
| FOV (Vertical) | 16.46° |
| Max Diameter | 80.3mm / 3.2" (Lens Hood Not Included) |
| Focus Ring Diameter | 80.3mm / 3.2" |
| Lens Format Coverage | Full Frame |
| Item Weight | 2.64 pounds (approx. 1.2 kg) |
| Product Dimensions | 5.12 x 5.12 x 5.12 inches |
9. Warranty and Support
Warranty Information:
SIRUI products are covered by a limited warranty against defects in materials and workmanship. The specific terms and duration of your warranty may vary by region and product. Please refer to the Service Card & Warranty Card included in your package for detailed information.
Customer Support:
For technical support, service, or warranty claims, please contact SIRUI USA. You can typically find contact information on the official SIRUI website or through the retailer where you purchased the product. When contacting support, please have your product model and serial number ready.
For firmware updates or related instructions, please email SIRUI USA support for assistance.