dji DL LENS - User Manual

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Overview

Installation of the Lens
Important installation considerations
Usage Features - Filters
Technical Specifications of Filters/Protectors
Recommended Combinations for Optimal Performance
Maintenance Features & Important Notes on Filters
Mounting Filters/Protector
Important Technical Specifications (Summary)
MTF (Modulation Transfer Function) Charts

The DJI DL/DL-S Lenses are professional prime lenses specifically designed for photography, offering a range of focal lengths when mounted on ZENMUSE™ gimbal cameras via the DJI DL mount (58 mm diameter). These lenses are engineered with an integrated carbon fiber casing, which effectively reduces the payload on the gimbal and camera, thereby enhancing stability during shooting.

The product line includes several full-frame lenses, such as the new DJI DL 18mm F2.8 ultra-wide lens, which is specially designed for 8K aerial photography. This 18mm lens provides a wide 100° Field of View (FOV), allowing for the capture of expansive scenes. Other full-frame lenses in the group include 24mm, 35mm, and 50mm options, providing a versatile system from wide-angle to telephoto. Additionally, the DJI DL-S 16mm F2.8 ND ASPH lens features a built-in ND4 filter and is capable of recording Super 35mm video. When this 16mm lens is used with the Zenmuse X7 gimbal camera, it has a focal length crop factor of 1.5.

The DJI DL/DL-S Lenses are compatible with Zenmuse X7, X9, and X9-8K Air gimbal cameras. However, it's important to note that the DJI DL 18mm F2.8 ASPH Lens is not compatible with the Zenmuse X7 gimbal camera. DJI plans to support more of its gimbal cameras with these lenses in the future, and users are advised to visit the official website for the latest compatibility information.

Each lens package comes pre-installed with a lens cap, lens rear cap, lens hood, and a balancing ring. The specific components may vary based on the actual product purchased. For instance, a DJI DL 24mm F2.8 LS ASPH Lens package would include these items.

Installation of the Lens:

The installation process involves a few straightforward steps, using the DJI DL 24mm F2.8 LS ASPH lens as an example for Zenmuse X7, and the DJI DL 18mm F2.8 LS ASPH lens for Zenmuse X9-8K Air.

For Zenmuse X7:

Remove the camera body cap.
Remove the lens cap and rear cap from the lens.
Align the two red dots on both the camera body and the lens, then insert the lens into the camera body.
Rotate the lens clockwise until a click is heard, indicating it is securely attached. To confirm, rotate the lens counter-clockwise slightly to ensure it is firmly in place.

For Zenmuse X9-8K Air:

Toggle the lens locking lever to the unlocked position. While pressing and holding the lens release button, rotate the camera body cap to detach it.
Remove the lens cap and rear cap.
Align the two red dots on the camera and the lens, then insert the lens into the camera body.
Rotate the lens clockwise until a click is heard. Rotate the lens counter-clockwise after mounting to ensure it is firmly attached.
Toggle the lens locking lever to cover the orange line on the camera until the lever is secure.

Important installation considerations:

Installation steps may differ for various X9 gimbal cameras; users should consult the corresponding product model's user manual for specific instructions.
Always mount the camera lens with the lens mount facing downward to prevent dust from entering the sensor, as dust can negatively impact performance.
Avoid pressing the lens release button while mounting the camera lens.

Usage Features - Filters:

DJI offers a range of DL/DL-S lens protectors and filters, available through the DJI online store. These accessories are designed to enhance shooting performance and protect the lens.

Technical Specifications of Filters/Protectors:

DJI DL/DL-S ND4 Filter: Diameter 46 mm, Weight Approx. 9 g
DJI DL/DL-S ND8 Filter: Diameter 46 mm, Weight Approx. 9 g
DJI DL/DL-S ND16 Filter: Diameter 46 mm, Weight Approx. 9 g
DJI DL/DL-S ND32 Filter: Diameter 46 mm, Weight Approx. 9 g
DJI DL/DL-S ND64 Filter: Diameter 46 mm, Weight Approx. 9 g
DJI DL/DL-S ND128 Filter: Diameter 46 mm, Weight Approx. 9 g
DJI DL/DL-S Lens Protector: Diameter 46 mm, Weight Approx. 9 g

Note: The DJI DL 18mm F2.8 ASPH Lens only supports filters with a diameter of 55 mm. Third-party filters must be purchased separately for this lens.

Recommended Combinations for Optimal Performance:

When mounting the lens onto the gimbal camera, the following combinations are recommended to achieve optimal shooting performance: a. Lens hood + lens protector b. Lens hood + balancing ring c. Lens hood + ND filter d. Two ND filters

The total weight of any of these combinations should be between 10 to 35 g. For optimal video recording performance, it is recommended to keep the total weight of attached components around 20 g when balancing the gimbal.

Maintenance Features & Important Notes on Filters:

The gimbal's performance is influenced by the camera's weight. Users should adhere to the specified requirements when mounting the lens protector, filter, and lens hood with DL/DL-S lenses.
Both DL/DL-S lenses support third-party filters. Ensure that any third-party filter used has a thickness of 4.4 mm and a total weight of 35 g (including the hood).
The lens protector is primarily for protecting the lens during transportation, storage, and general use. It is advisable to use the protector in harsh shooting environments to extend the lens's service life. However, be aware that using the protector might cause lens glare in some situations.

Mounting Filters/Protector:

Rotate and remove the lens hood.
Rotate and remove the balancing ring.
Mount the new filter (or protector) and then the lens hood. When mounting the lens hood, align the red dots on the hood and the lens, then rotate to tighten. If two filters are to be mounted, attach both filters to the lens and DO NOT mount the lens hood. Removing the lens hood may reduce the gimbal camera's ability to suppress glare.

Important Technical Specifications (Summary):

Lens	Focal Length	Aperture Range	35mm Equivalent	Field of View (FOV)	Close Focus	Filter Diameter	Elements/Groups/ASPH	Barrel Dimensions (DxL, incl. hood)	Weight (incl. ring & hood)
DL-S 16mm F2.8 ND ASPH*	16 mm	F2.8~F16	/	/	0.40 m	46 mm	13/12/4	Φ55.0 x 69.1 mm	Approx. 178 g
DL 18mm F2.8 ASPH	18 mm	F2.8~F22	18 mm	90.0×66.8°	0.30 m	55 mm	9/8/3	Φ64.5 x 62.8 mm	Approx. 182 g
DL 24mm F2.8 LS ASPH	24 mm	F2.8~F16	24 mm	73.7×53.1°	0.65 m	46 mm	9/8/3	Φ55.0 x 71.2 mm	Approx. 178 g
DL 35mm F2.8 LS ASPH	35 mm	F2.8~F16	35 mm	54.4×37.8°	0.85 m	46 mm	9/8/3	Φ55.0 x 71.2 mm	Approx. 179 g
DL 50mm F2.8 LS ASPH	50 mm	F2.8~F16	50 mm	39.6×27°	0.93 m	46 mm	9/7/2	Φ55.0 x 71.2 mm	Approx. 182 g

*The DJI DL-S 16mm F2.8 ND ASPH lens has a built-in ND4 filter that can be configured in DJI GO 4.

MTF (Modulation Transfer Function) Charts:

MTF charts are used to evaluate a lens's ability to reproduce contrast and resolve fine details. Lower spatial frequencies on the chart indicate overall contrast, while higher spatial frequencies represent detail resolution. The "Image Height" axis shows the distance from the center of the sensor to a given point on the lens. An MTF value of 100% signifies perfect performance. The manual provides MTF charts for each lens model (DL-S 16mm F2.8 ND ASPH, DL 18mm F2.8 ASPH, DL 24mm F2.8 LS ASPH, DL 35mm F2.8 LS ASPH, and DL 50mm F2.8 LS ASPH), illustrating their sagittal and meridional performance at 10, 30, and 45 lp/mm.