L086-DEVKIT Brief L086 is 6.8-120mm focal length (18x) motorized zoom lens is designed for 1/1.8" image sensors, has zoom/focus/iris functions, designed for 8M sensors. Specifications Optics Image sensor 1/1.8" Effective image area > 9.2mm Focal distance 6.8 ~ 120mm / ±5% Aperture f/1.6 ~ f/4.1 Focus range WIDE: 1.0m - infinity TELE: 2.0m - infinity Field of view (D=8.81mm) WIDE: 65.3° TELE: 4.2° Distortion WIDE: 0.4% TELE: 0.11% Recommended image sensor IMX334 Mechanics Flange back (FB, see diagram below) +0.374 (in glass t=0.3 IRCF) Lens zoom structure The stepper motor is directly connected to the screw Lens focusing structure The stepper motor is directly connected to the screw Lens size Length: 90.4mm Width: 45mm Height: 45mm Front end diameter:  40.5mm Weight 138g (+controller 7.8g) 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. Motor specifications Screw pitch 0.4mm Spiral rotation direction Right Rated voltage 5.0 VDC Coil resistance 60Ω ± 10% / phase (T=25°C) Phase count 2 Step angle 18° / step Max start frequency 800 PPS @ at 5.0 VDC Max operating frequency 1200 PPS @ 5.0 VDC Pull torque 2.8 gf-cm min (at 480 PPS @ 5.0 VDC) Push torque 3.8 gf-cm min (at 480 PPS @ 5.0 VDC) Operating temperature range -30°C ~ +70°C Position alignment sensor PI Model number RPI-222 / ROHM Iris Driving resistance 120Ω ± 10% (T=20°C, 65% RH) Braking resistance 120Ω ± 10% (T=20°C, 65% RH) Close to open operation 3.5 ~ 5.0V Open to close operation 0 ~ 0.8V IR switch Coil resistance 22.5 ± 10% (T=20°C) Operation voltage 4.5 ~ 5.0V Current consumption 144 ~ 200mA Filter thickness 0.3mm Switching time 200 ~ 500ms Filters Open air 380 ~ 650nm (TAVG >90%) Zoom-Focus curve diagram Please check the software in the GitHub repository for more detailed table. Wiring Lens signals routed by 43 pin 0.5mm pitch FFC cable. Contacts facing top. Nr Function 1 ZOOM1 MOTOR B- 2 ZOOM1 MOTOR A+ 3 ZOOM1 MOTOR B+ 4 ZOOM1 MOTOR A- 5 ZOOM2 MOTOR B- 6 ZOOM2 MOTOR A+ 7 ZOOM2 MOTOR B+ 8 ZOOM2 MOTOR A- 9 ZOOM1 PI(ANODE) 10 ZOOM1 PI(CATHODE EMITTER) 11 ZOOM1 PI(COLLECTOR) 12 GND 13 IRIS DRIVE+ 14 GND 15 IRIS HALL- 16 IRIS BIAS- 17 IRIS HALL+ 18 IRIS BIAS+ 19 GND 20 IRIS DRIVE- 21 IRIS CONT- 22 IRIS CONT+ 23 IR- 24 IR+ 25 FOCUS PI(CATHODE EMITTER) 26 FOCUS PI(COLLECTOR) 27 FOCUS PI(ANODE) 28 ZOOM2 PI(CATHODE EMITTER) 29 ZOOM2 PI(COLLECTOR) 30 ZOOM2 PI(ANODE) 31 TEMP COM 32 TEMP OUT 33 FOCUS MOTOR B- 34 FOCUS MOTOR A+ 35 FOCUS MOTOR B+ 36 FOCUS MOTOR A Dimensions Detailed 3D model is hosted on GitHub 3D models repository Controller SCE2-L086 SCE2-L086 is inexpensive dual layer application board designed to match lens FFC routing and topology based on SCE2-M 4 channel stepper motor controller module. Controller is based on STM32 microprocessor and TMC2300 motor drivers. Modern stepper motor drivers allow wide range of operation and suitable from operating NEMA17 to micro motor. Control logic is based on CNC control firmware GRBL. PCB revisions RevA Initial lens tests Simplified DC iris control (on/off) For testing use 44pin FFC Check IR filter control with trinamic Check actual homing, fine tune GRBP parameters Check if FFC connector numbering matches cable Add I2C thermometer RevB Refine design Use new 43 pin FFC connector Replace internal I2C thermometer with slave connector Use NTC with on-board ADC for temperature reading RevC Replaced 43 pin FFC connector to 36 pin Updated some resistor values Features USB and 3.3V UART control 4 axis motion controller Fully integrated design Powered by USB 5V rail I2C slave for external sensors and controllers (Functionality is determined by firmware) Linear path interpolation Dimensions Power profile Typical power consumption of the lens