# L085-DEVKIT

### Brief

L085 is 5.3-130mm focal length (25x) motorized zoom lens is designed for 1/2.7" image sensors, has zoom/focus/iris functions, designed for 5M sensors.

[![IMG_4788__w.jpg](https://wiki.kurokesu.com/uploads/images/gallery/2022-01/scaled-1680-/img-4788-w.jpg)](https://wiki.kurokesu.com/uploads/images/gallery/2022-01/img-4788-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%;">1/2.7" Effective image area &gt; 6.8mm</td></tr><tr><td style="width: 50%;">Focal distance</td><td style="width: 50%;">5.3 ~ 130mm / ±5%</td></tr><tr><td style="width: 50%;">Aperture</td><td style="width: 50%;">f/1.6 ~ f/4.3</td></tr><tr><td style="width: 50%;">Focus range</td><td style="width: 50%;">- WIDE: 0.1m - infinity
- TELE: 1.5m - infinity

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

</td><td style="width: 50%;">- WIDE: 67.9°
- TELE: 2.8°

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

</td><td style="width: 50%;">- WIDE: -2.9%
- TELE: 0.3%

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

</td><td style="width: 50%;">IMX335</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%;">-0.325mm (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: 92.49mm
- Width: 50.1mm
- Height: 43.8mm
- Front end diameter: 44.6mm

</td></tr><tr><td style="width: 50%;">Weight</td><td style="width: 50%;">116g (+controller 7.8g)</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)

#### Zoom-Focus curve diagram

<div id="bkmrk-please-check-the-sof"><div><div>[![L085_curves.png](https://wiki.kurokesu.com/uploads/images/gallery/2023-04/scaled-1680-/l085-curves.png)](https://wiki.kurokesu.com/uploads/images/gallery/2023-04/l085-curves.png)</div><div>Please check the software in the GitHub repository for more detailed table.</div></div></div>### Dimensions

[![L085-DEVKIT.PNG](https://wiki.kurokesu.com/uploads/images/gallery/2022-04/scaled-1680-/l085-devkit.PNG)](https://wiki.kurokesu.com/uploads/images/gallery/2022-04/l085-devkit.PNG)

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

### Wiring

Lens signals routed by 26 pin 0.5mm pitch FFC cable.

<table border="1" id="bkmrk-nr-function-1-zoom1-" style="border-collapse: collapse; width: 100%; height: 1276px;"><tbody><tr style="height: 29px;"><td class="align-center" style="width: 13.4568%; height: 29px;">**Nr**</td><td class="align-center" style="width: 86.5432%; height: 29px;">**Function**</td></tr><tr style="height: 29px;"><td style="width: 13.4568%; height: 29px;">1</td><td style="width: 86.5432%; height: 29px;">ZOOM A+</td></tr><tr style="height: 29px;"><td style="width: 13.4568%; height: 29px;">2</td><td style="width: 86.5432%; height: 29px;">ZOOM B+</td></tr><tr style="height: 29px;"><td style="width: 13.4568%; height: 29px;">3</td><td style="width: 86.5432%; height: 29px;">ZOOM A-</td></tr><tr style="height: 29px;"><td style="width: 13.4568%; height: 29px;">4</td><td style="width: 86.5432%; height: 29px;">ZOOM B-</td></tr><tr style="height: 29px;"><td style="width: 13.4568%; height: 29px;">5</td><td style="width: 86.5432%; height: 29px;">IR-</td></tr><tr style="height: 29px;"><td style="width: 13.4568%; height: 29px;">6</td><td style="width: 86.5432%; height: 29px;">IR+</td></tr><tr style="height: 29px;"><td style="width: 13.4568%; height: 29px;">7</td><td style="width: 86.5432%; height: 29px;">N.C.</td></tr><tr style="height: 29px;"><td style="width: 13.4568%; height: 29px;">8</td><td style="width: 86.5432%; height: 29px;">HALL+</td></tr><tr style="height: 29px;"><td style="width: 13.4568%; height: 29px;">9</td><td style="width: 86.5432%; height: 29px;">BIAS+</td></tr><tr style="height: 29px;"><td style="width: 13.4568%; height: 29px;">10</td><td style="width: 86.5432%; height: 29px;">HALL-</td></tr><tr style="height: 29px;"><td style="width: 13.4568%; height: 29px;">11</td><td style="width: 86.5432%; height: 29px;">BIAS-</td></tr><tr style="height: 29px;"><td style="width: 13.4568%; height: 29px;">12</td><td style="width: 86.5432%; height: 29px;">N.C.</td></tr><tr style="height: 29px;"><td style="width: 13.4568%; height: 29px;">13</td><td style="width: 86.5432%; height: 29px;">IRIS DRIVE+</td></tr><tr style="height: 29px;"><td style="width: 13.4568%; height: 29px;">14</td><td style="width: 86.5432%; height: 29px;">IRIS DRIVE-</td></tr><tr style="height: 29px;"><td style="width: 13.4568%; height: 29px;">15</td><td style="width: 86.5432%; height: 29px;">IRIS CONT+</td></tr><tr style="height: 29px;"><td style="width: 13.4568%; height: 29px;">16</td><td style="width: 86.5432%; height: 29px;">IRIS CONT-</td></tr><tr style="height: 29px;"><td style="width: 13.4568%; height: 29px;">17</td><td style="width: 86.5432%; height: 29px;">Focus RST</td></tr><tr style="height: 29px;"><td style="width: 13.4568%; height: 29px;">18</td><td style="width: 86.5432%; height: 29px;">Therm1</td></tr><tr style="height: 29px;"><td style="width: 13.4568%; height: 29px;">19</td><td style="width: 86.5432%; height: 29px;">Therm2</td></tr><tr style="height: 29px;"><td style="width: 13.4568%; height: 29px;">20</td><td style="width: 86.5432%; height: 29px;">SENS VCC</td></tr><tr style="height: 29px;"><td style="width: 13.4568%; height: 29px;">21</td><td style="width: 86.5432%; height: 29px;">Zoom RST</td></tr><tr style="height: 29px;"><td style="width: 13.4568%; height: 29px;">22</td><td style="width: 86.5432%; height: 29px;">SENS GND</td></tr><tr style="height: 29px;"><td style="width: 13.4568%; height: 29px;">23</td><td style="width: 86.5432%; height: 29px;">Focus A+</td></tr><tr style="height: 29px;"><td style="width: 13.4568%; height: 29px;">24</td><td style="width: 86.5432%; height: 29px;">Focus B+</td></tr><tr style="height: 29px;"><td style="width: 13.4568%; height: 29px;">25</td><td style="width: 86.5432%; height: 29px;">Focus A-</td></tr><tr style="height: 29px;"><td style="width: 13.4568%; height: 29px;">26</td><td style="width: 86.5432%; height: 29px;">Focus B-</td></tr></tbody></table>

### Controller

Controller uses [SCE2-M](https://wiki.kurokesu.com/books/sce2) module populated on the custom carrier board.

#### Schematics

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

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

#### PCB

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