# L084-DEVKIT

### Brief

L084 is 6.3-252mm focal length (40x) motorized zoom lens is designed for 1/1.8" image sensors, has zoom/focus/iris functions, designed for 8M sensors.

[![IMG_4791__w.jpg](https://wiki.kurokesu.com/uploads/images/gallery/2022-01/scaled-1680-/img-4791-w.jpg)](https://wiki.kurokesu.com/uploads/images/gallery/2022-01/img-4791-w.jpg)

### Specifications

#### Optics

<table border="1" id="bkmrk-image-sensor-1%2F2.7%22-" style="border-collapse: collapse; width: 100%;"><tbody><tr><td style="width: 50%;">Image sensor</td><td style="width: 50%;">1/1.8" Effective image area &gt; 9.2mm</td></tr><tr><td style="width: 50%;">Focal distance</td><td style="width: 50%;">6.3 ~ 252mm / ±5%</td></tr><tr><td style="width: 50%;">Aperture</td><td style="width: 50%;">f/1.4 ~ f/5.0</td></tr><tr><td style="width: 50%;">Focus range</td><td style="width: 50%;">- WIDE: 1.0m - infinity
- TELE: 2.0m - infinity

</td></tr><tr><td style="width: 50%;">Field of view (D=8.81mm)

</td><td style="width: 50%;">- WIDE: 73.0°
- TELE: 1.9°

</td></tr><tr><td style="width: 50%;">Distortion

</td><td style="width: 50%;">- WIDE: -4.09%
- TELE: 2.89%

</td></tr><tr><td style="width: 50%;">Recommended image sensor

</td><td style="width: 50%;">IMX334</td></tr></tbody></table>

#### Mechanics

<table border="1" id="bkmrk-lens-length-%28image-s" style="border-collapse: collapse; width: 100%;"><tbody><tr><td style="width: 50%;">Flange back (**FB**, see diagram below)</td><td style="width: 50%;">+0.93 (in glass t=0.3 IRCF)

</td></tr><tr><td style="width: 50%;">Lens zoom structure</td><td style="width: 50%;">The stepper motor is directly connected to the screw</td></tr><tr><td style="width: 50%;">Lens focusing structure</td><td style="width: 50%;">The stepper motor is directly connected to the screw</td></tr><tr><td style="width: 50%;">Lens size</td><td style="width: 50%;">- Length: 168.7mm
- Width: 72.8mm
- Height: 57mm
- Front end diameter: 69.5mm

</td></tr><tr><td style="width: 50%;">Bare lens weight</td><td style="width: 50%;">465g (+controller 21.4g)</td></tr></tbody></table>

In order to accommodate different image sensors, the focal distance is set back by flange back (FB) distance. The actual distance for a specific sensor has to be calculated and spacers used. If the image plane is not set correctly, focus irregularities in the projected picture are expected.

[![fb2.png](https://wiki.kurokesu.com/uploads/images/gallery/2023-05/scaled-1680-/fb2.png)](https://wiki.kurokesu.com/uploads/images/gallery/2023-05/fb2.png)

#### Motor specifications

<table border="1" id="bkmrk-screw-pitch-0.4mm-sp" style="border-collapse: collapse; width: 100%;"><tbody><tr><td style="width: 50%;">Screw pitch</td><td style="width: 50%;">0.4mm</td></tr><tr><td style="width: 50%;">Spiral rotation direction</td><td style="width: 50%;">Right</td></tr><tr><td style="width: 50%;">Rated voltage</td><td style="width: 50%;">5.0 VDC</td></tr><tr><td style="width: 50%;">Coil resistance</td><td style="width: 50%;">- Zoom1: 20Ω ± 10% / phase (T=25°C)
- Zoom2: 20Ω ± 10% / phase (T=25°C)
- Focus: 55Ω ± 10% / phase (T=25°C)
- Iris: 35Ω ± 10% / phase (T=25°C)

</td></tr><tr><td style="width: 50%;">Phase count</td><td style="width: 50%;">2</td></tr><tr><td style="width: 50%;">Step angle</td><td style="width: 50%;">- Zoom1, Zoom2, Focus: 18° / step
- Iris: 0.6° / step

</td></tr><tr><td style="width: 50%;">Operating temperature range</td><td style="width: 50%;">-30°C ~ +70°C</td></tr></tbody></table>

#### Position alignment sensor PI

<table border="1" id="bkmrk-model-number-rpi-222" style="border-collapse: collapse; width: 100%;"><tbody><tr><td style="width: 50%;">Model number</td><td style="width: 50%;">- Zoom1, Zoom2, Focus: RPI-222 <span class="fontstyle0">ROHM</span>
- <span class="fontstyle0">Iris: GP1S196HCZ0F SHARP</span>

</td></tr></tbody></table>

#### Iris

<div id="bkmrk-blade-count-10-drive"><div><table border="1" id="bkmrk-driving-resistance-1" style="border-collapse: collapse; width: 100%; height: 58px;"><tbody><tr style="height: 29px;"><td style="width: 50%; height: 29px;">Blade count</td><td style="width: 50%; height: 29px;">10</td></tr><tr style="height: 29px;"><td style="width: 50%; height: 29px;">Drive mode</td><td style="width: 50%; height: 29px;">Stepper motor</td></tr></tbody></table>

</div></div>#### IR switch

<div id="bkmrk-coil-resistance-22.5"><table border="1" id="bkmrk-coil-resistance-25-%C2%B1" style="border-collapse: collapse; width: 100%;"><tbody><tr><td style="width: 50%;">Coil resistance</td><td style="width: 50%;">22.5 ± 10% (T=20°C)</td></tr><tr><td style="width: 50%;">Operation voltage</td><td style="width: 50%;">4.5 ~ 5.0V

</td></tr><tr><td style="width: 50%;">Current consumption</td><td style="width: 50%;">144 ~ 200mA

</td></tr><tr><td style="width: 50%;">Filter thickness</td><td style="width: 50%;">0.3mm

</td></tr><tr><td style="width: 50%;">Filter count</td><td style="width: 50%;">2

</td></tr><tr><td style="width: 50%;">Switching time</td><td style="width: 50%;">200 ~ 500ms

</td></tr><tr><td style="width: 50%;">Filters</td><td style="width: 50%;">- <span class="fontstyle0">Open air  
    </span>
- <span class="fontstyle0">380 ~ 650nm (T<sub>AVG</sub> &gt;90%)</span>
- <span class="fontstyle0">BP780 (400~750nm T<sub>AVG</sub> &gt;1%, 780~1100nm T<sub>AVG</sub> &gt;90%)</span>

</td></tr></tbody></table>

</div>### Zoom-Focus curve diagram

[![L084.png](https://wiki.kurokesu.com/uploads/images/gallery/2023-04/scaled-1680-/l084.png)](https://wiki.kurokesu.com/uploads/images/gallery/2023-04/l084.png)

Please check the software in the GitHub repository for more detailed table.

### Camera adapter plates

292.84104B adapter plate was designed for IMX290 and IMX477 based cameras. [L084](https://www.kurokesu.com/shop/L084-DEVKIT) and [L117](https://www.kurokesu.com/shop/L117-DEVKIT) lenses can be mated with board level [C1\_PRO](https://www.kurokesu.com/shop/CAMERA_C1_PRO), [C2](https://www.kurokesu.com/shop/C2_USBC), and [IMX477\_LEGACY](https://www.kurokesu.com/shop/IMX477_Z1_LEGACY) camera boards.

[![292.84104B.png](https://wiki.kurokesu.com/uploads/images/gallery/2022-10/scaled-1680-/292-84104b.png)](https://wiki.kurokesu.com/uploads/images/gallery/2022-10/292-84104b.png)

### Dimensions

[![L084-DEVKIT.PNG](https://wiki.kurokesu.com/uploads/images/gallery/2022-04/scaled-1680-/9VNl084-devkit.PNG)](https://wiki.kurokesu.com/uploads/images/gallery/2022-04/9VNl084-devkit.PNG)

<p class="callout info">Detailed 3D model is hosted on [GitHub 3D models repository](https://github.com/Kurokesu/3d_models)</p>

### Power profile

Typical power consumption of the lens

[![L084_annotated.png](https://wiki.kurokesu.com/uploads/images/gallery/2023-02/scaled-1680-/l084-annotated.png)](https://wiki.kurokesu.com/uploads/images/gallery/2023-02/l084-annotated.png)