VILTROX AF 135/1.8 LAB Z Lens

Product Overview

The VILTROX AF 135/1.8 LAB Z is a Z-mount auto-focusing lens designed for high-quality photography. It features a 135mm focal length with a large F1.8 aperture, offering excellent low-light performance and subject isolation. The lens incorporates 9 groups and 14 optical elements, including 4 ED (Extra-low Dispersion) lenses and 2 lenses with high refractive index, to minimize aberrations and enhance image clarity. It utilizes a dual floating magnetic levitation VCM focusing mechanism for precise and smooth autofocus. The lens is constructed with a precision metal structure and is dust-proof and moisture-proof.

A detailed line drawing of the VILTROX AF 135/1.8 LAB Z lens shows its cylindrical body, focusing ring, and mounting base.

Shenzhen Jueying Technology Co., Ltd. is the manufacturer, located at 1207, Floor 12, Block B, Chinto Science&Technology Building, Minzhi Street, Longhua, Shenzhen, Guangdong, China. They can be reached via TEL: +86-755-2877 9024, MAIL: info@viltrox.com, or FAX: 0755-2877 4730. Their website is www.viltrox.com.

Key Features

• 135mm focal length, F1.8 large aperture
• 9 groups of 14 optical structures, including 4 ED lenses, 2 lenses with high refractive index
• HD Nano multilayer coating with water-resistant and antifouling coating
• Electronic aperture, internal focus, constant lens length
• Dual floating magnetic levitation VCM focusing mechanism
• Precision metal structure
• Dust-proof and moisture-proof

Identifying the Parts

A diagram illustrates the various parts of the lens. The numbered components are:

• 1 Lens hood position
• 2 Lens hood index
• 3 Focusing ring
• 4 Focusing mode switch (MF/AF)
• 5 Custom button Fn2
• 6 Custom button Fn1
• 7 Multi-functional ring
• 8 Focusing range switching rod
• 9 CLICK switch
• 10 Lens mounting index
• 11 Rubber seal
• 12 Lens data display
• 13 Electronic contacts
• 14 USB upgrade port

Lens Information Panel

When the lens is mounted on a camera and powered on, a lens information panel displays key data. This panel includes:

• [Object distance indication] identification
• [AB preset object distance] identification
• ⚙️ [Fn icon]
• [AB preset object distance icon]
• [Object distance bar]
• Current object distance display
• [Aperture bar]
• [Aperture indication] identification

Functions

Focus Lock

The Custom button Fn1 serves as the focus lock button. Pressing Fn1 displays a yellow ⚙️ [Fn icon], locking the focus. The camera's specified functions can then be performed. Pressing the focus lock button again in AF mode cancels AF, locking the focus. Releasing the focus lock button while half-pressing the shutter restarts AF.

A/B Preset Object Distance Operation

Custom button Fn2 allows switching between preset object distances A and B. When the [A/B preset icon] shows a gray 'A', preset distance A is ready. Pressing Fn2 changes it to a yellow 'A', indicating the lens has reached preset distance A. Pressing Fn2 again displays a yellow 'B', indicating the lens has reached preset distance B. If the object distance is readjusted, the icon reverts to gray.

A/B Preset Object Distance Update

To update preset distance A, adjust the lens to the desired distance while the [A/B preset icon] displays the 'A' icon. Then, press and hold Custom button Fn2. When the 'A' icon turns green, release the button to confirm the update. Updating preset distance B follows the same procedure.

Handling the Lens

Attaching and Detaching the Lens

To attach the lens

Align the white index on the lens barrel with the white index on the camera. Insert the lens into the camera mount and rotate it counter-clockwise until it locks. Refer to the camera's user manual for detailed instructions.

To detach the lens

Hold down the lens release button on the camera. Rotate the lens clockwise until it stops, then detach the lens. Place the lens with its back facing upward to prevent scratches on the lens surface and electronic contacts.

Lens cap

When the lens is detached, cover it with the dust cap. Align the mounting index on the dust cap with the mounting index on the lens, then rotate the cap counter-clockwise until it stops. Remove the cap by rotating it clockwise.

Lens Hood

The lens hood is used to reduce flare or scattering light (ghosting) and to protect the front of the lens from rain, snow, and dust.

Attaching the lens hood

Align the [attaching index] on the lens hood with the [index] on the lens. Insert the lens hood into the lens mount and rotate it clockwise until it clicks. The [stop index] on the lens hood should then align with the [index] on the lens.

Detaching the lens hood

Rotate the lens hood counter-clockwise until the [attaching index] aligns with the [index] on the lens, then remove the lens hood. The lens hood can also be attached or stored in the reverse direction.

Lens Construction Diagram

An exploded view shows the internal lens elements. The diagram indicates elements that are ED low-dispersion lenses and lenses with high refractive index.

MTF Graphs

The MTF graphs display the lens's performance. Two graphs are provided, showing Modulation Transfer Function (MTF) values against spatial frequency (10 and 30 Line Pair/Millimeter) for different apertures (F1.8 and F8) and conditions (Sagittal 'S' and Meridional 'M').

Safety Notes, Using Tips, and Cleaning

Safety Notes

• Do not look at the sun or bright sources through the lens or camera, as this may impair vision.
• Do not place the lens in direct sunlight, whether mounted or not, as it may fuse and cause a fire.
• Keep the lens away from children to prevent accidents or injury.
• Do not disassemble internal parts of the product yourself, as this may cause damage.

Using Tips

• When attaching the lens, be careful to avoid mechanical impact.
• Always put the lens cap on the lens when storing it.
• Avoid storing the lens in very humid places to prevent mildew.
• Although the lens is dust-proof and moisture-proof, it is not fully waterproof. Exercise caution in rain or near water, as water damage to internal parts, lenses, or electronics may not be repairable.
• Temperature changes can cause fogging or water droplets on the lens surface. When moving from a cold to a warm indoor environment, place the lens in an airtight plastic bag or an oven until it reaches room temperature. Use the same method when moving from a warm to a cold environment.

Cleaning

• Avoid touching lens contacts with your hands. If the lens gets dirty, use a lens blower to remove dust and then gently wipe with a clean, soft lens cloth.
• Do not use organic solvents such as dilute or gasoline for cleaning.

Specifications

The Company reserves the right to change the appearance, technical specifications, and performance of this product at any time.