1. Introduction
Thank you for purchasing the VILTROX AF 35mm F1.7 X-Mount lens. This high-performance autofocus prime lens is designed for Fujifilm X-mount mirrorless cameras, offering a bright f/1.7 aperture for excellent low-light performance and creative depth of field control. This manual provides essential information for the proper use, maintenance, and care of your lens.
2. Safety Precautions
- Do not look directly at the sun or other strong light sources through the lens, as this can cause permanent eye damage.
- Keep the lens away from water and moisture to prevent damage to electronic components.
- Avoid exposing the lens to extreme temperatures or rapid temperature changes.
- Do not attempt to disassemble or repair the lens yourself. Contact authorized service personnel for assistance.
- Keep out of reach of children.
3. Package Contents
Verify that all items are present in your package:
- VILTROX AF 35mm F1.7 X-Mount Lens
- Front Lens Cap
- Rear Lens Cap
- Lens Hood
- Lens Pouch
- Instruction Manual (this document)
- Warranty Card
Figure 3.1: Package Contents
4. Product Overview
The VILTROX AF 35mm F1.7 X-Mount lens is a compact and lightweight prime lens designed for Fujifilm APS-C cameras. It offers a versatile 53mm equivalent focal length (in 35mm format) and a wide f/1.7 aperture.
Figure 4.1: VILTROX AF 35mm F1.7 X-Mount Lens with Hood
Figure 4.2: VILTROX AF 35mm F1.7 X-Mount Lens Front View
Figure 4.3: VILTROX AF 35mm F1.7 X-Mount Lens Rear View with USB-C Port
5. Setup
5.1 Attaching the Lens to Your Camera
- Ensure your camera is turned off.
- Remove the rear lens cap from the VILTROX lens and the body cap from your camera.
- Align the white index mark on the lens barrel with the corresponding index mark on your camera's lens mount.
- Insert the lens into the camera mount and rotate it clockwise until it clicks into place. Do not force the lens.
Figure 5.1: Lens Mounted on a Fujifilm Camera
5.2 Attaching the Lens Hood
The included lens hood helps to block stray light, reducing flare and ghosting, and provides physical protection for the front element.
- Align the mark on the lens hood with the mark on the front of the lens.
- Gently push the hood onto the lens and rotate it clockwise until it locks into place.
5.3 Firmware Updates
The lens features a USB-C port for firmware updates. Regularly checking for and installing the latest firmware ensures optimal performance and compatibility with new camera models.
- Visit the official VILTROX website for the latest firmware and update instructions.
- Connect the lens to your computer using a USB-C cable.
- Follow the on-screen instructions provided by the firmware update tool.
Figure 5.2: USB-C Port for Firmware Updates
6. Operation
6.1 Autofocus (AF)
This lens is equipped with an STM motor for fast, precise, and quiet autofocus performance. It supports various AF modes available on your Fujifilm camera.
- Single AF (AF-S): Ideal for stationary subjects. Focus locks when the shutter button is half-pressed.
- Continuous AF (AF-C): Suitable for moving subjects. Focus continuously adjusts as long as the shutter button is half-pressed.
- Manual Focus (MF): Rotate the focus ring on the lens to adjust focus manually.
The lens also features low focus breathing, which minimizes changes in the angle of view when adjusting focus, beneficial for video recording.
6.2 Aperture Control
The large f/1.7 maximum aperture allows for excellent performance in low-light conditions and provides a shallow depth of field for creating pleasing background blur (bokeh). Aperture can be controlled via your camera's settings.
6.3 Focal Length and Perspective
With a 35mm focal length (53mm equivalent on APS-C), this lens offers a natural perspective similar to the human eye, making it versatile for portraits, street photography, landscapes, and general-purpose shooting.
6.4 Minimum Focusing Distance
The lens has a minimum focusing distance of 0.33 meters (33cm), allowing for close-up shots with detailed subjects.
Figure 6.1: Key Features of the Lens
7. Maintenance
7.1 Cleaning the Lens
- Use a blower brush to remove dust and loose particles from the lens surface.
- For smudges or fingerprints, use a clean, soft microfiber cloth specifically designed for optics, along with a small amount of lens cleaning solution. Apply the solution to the cloth, not directly to the lens.
- Clean the lens body with a soft, dry cloth. Do not use organic solvents.
7.2 Storage
- When not in use, attach both front and rear lens caps.
- Store the lens in a cool, dry, and well-ventilated area, away from direct sunlight and chemicals.
- If storing for extended periods, consider using a dehumidifying agent to prevent mold and mildew growth.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Lens not recognized by camera | Improper mounting; dirty contacts; outdated firmware. | Re-mount the lens securely; clean lens and camera contacts with a dry cloth; update lens firmware. |
| Autofocus is slow or inaccurate | Low light conditions; subject lacks contrast; camera AF settings. | Use adequate lighting; focus on areas with good contrast; check camera AF mode and settings. |
| Images are blurry | Incorrect focus; camera shake; dirty lens element. | Ensure proper focus; use a faster shutter speed or tripod; clean the lens. |
| Lens hood does not attach securely | Incorrect alignment. | Ensure the alignment marks on the hood and lens are matched before twisting to lock. |
9. Specifications
| Feature | Detail |
|---|---|
| Brand | VILTROX |
| Model Number | AF 35mm F1.7 XF |
| Focal Length | 35mm (53mm equivalent on APS-C) |
| Maximum Aperture | f/1.7 |
| Minimum Aperture | f/16 |
| Lens Type | Standard Prime Lens |
| Compatible Mountings | Fujifilm X |
| Optical Design | 11 elements in 9 groups (including 2 HR, 1 ED, 1 ASPH elements) |
| Autofocus Motor | STM (Stepping Motor) |
| Minimum Focusing Distance | 0.33m (1.08 ft) |
| Filter Size | 52mm |
| Dimensions (Diameter x Length) | Approximately 64mm x 54.7mm (2.5 x 2.15 inches) |
| Item Weight | Approximately 170g (0.37 lbs) |
| Firmware Update Port | USB-C |
Figure 9.1: Optical Design and MTF Chart
Figure 9.2: Lens Dimensions
Figure 9.3: Lens Weight
10. Warranty and Support
VILTROX products are covered by a limited warranty. Please refer to the warranty card included in your package for specific terms and conditions. For technical support, service, or inquiries, please contact VILTROX customer service through their official website or the retailer where you purchased the product.
VILTROX Official Website: www.viltrox.com
