# L120-DEVKIT

### Brief

L120 is 6.7-190mm focal length (28x) motorized zoom lens is designed for 1/1.8" image sensors, has zoom/focus/iris functions, designed for 5M sensors.

### 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; 9.3mm</td></tr><tr><td style="width: 50%;">Focal distance</td><td style="width: 50%;">6.7 ~ 190mm / ±5%</td></tr><tr><td style="width: 50%;">Aperture</td><td style="width: 50%;">f/1.6 ~ f/4.7</td></tr><tr><td style="width: 50%;">Focus range</td><td style="width: 50%;">- WIDE: 0.1m - infinity
- TELE: 1.0m - infinity

</td></tr><tr><td style="width: 50%;">Field of view (D=8.26mm)

</td><td style="width: 50%;">- WIDE: 65.5°
- TELE: 2.4°

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

</td><td style="width: 50%;">- WIDE: -1.08%
- TELE: 0.35%

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

</td><td style="width: 50%;">IMX385</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%;">-1.0mm (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: 119mm
- Width: 50mm
- Height: 50mm
- Front end diameter: 43mm

</td></tr><tr><td style="width: 50%;">Weight</td><td style="width: 50%;">194g (+controller 7.6g)</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%;">- Zoom: 55Ω ± 10% / phase (T=25°C)
- Focus: 55Ω ± 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%;">- Zoom: 18° / step
- Focus: 18° / 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%;"><span class="fontstyle0">GP1S093HCZ0F SHARP</span><span class="fontstyle0">  
</span>

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

#### Iris

<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;">Driving resistance</td><td style="width: 50%; height: 29px;"><span class="fontstyle0">120Ω ± 10% (T=20°C, 65% RH)</span></td></tr><tr style="height: 29px;"><td style="width: 50%; height: 29px;">Braking resistance</td><td style="width: 50%; height: 29px;"><span class="fontstyle0">120Ω ± 10% (T=20°C, 65% RH)</span></td></tr><tr><td style="width: 50%;">Close to open operation</td><td style="width: 50%;"><span class="fontstyle0">3.5 ~ 5.0V  
</span></td></tr><tr><td style="width: 50%;">Open to close operation</td><td style="width: 50%;"><span class="fontstyle0">0 ~ 0.8V</span></td></tr></tbody></table>

#### IR switch

<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%;">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>

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

### Dimensions

[![L120-DEVKIT.PNG](https://wiki.kurokesu.com/uploads/images/gallery/2022-08/scaled-1680-/l120-devkit.PNG)](https://wiki.kurokesu.com/uploads/images/gallery/2022-08/l120-devkit.PNG)

<p class="callout info">More detailed documentation coming soon!</p>