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WSAL18245 – 8-50mm Zoom Lens for Pi/en

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Documentation notice: This technical documentation was independently rewritten from an archived supplier source. Check technical details and commands against the product version and manufacturer documentation before use.

Summary

The 8-50mm CS-mount zoom lens by Waveshare is designed to be used with the IMX477 12.3MP camera or the Raspberry Pi HQ Camera. It provides a zoom range of 8 to 50 mm at an aperture of F1.4 and a fixed back focal length (BFL) of 7.53 mm.

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Technical overview

  • Lens type: CS/CS lens, exclusively for use with the IMX477 12.3MP camera or the Raspberry Pi HQ Camera
  • Zoom range: 8–50 mm
  • Aperture: F1.4
  • Sensor size compatibility: supports sensors in 1", 2/3" and 1/1.8" formats; the lens is a CS/CS lens
  • Field of view (FoV): varies by sensor model – e.g., 1": 20.9° × 15.8°, 2/3": 14.4° × 10.8°, 1/1.8": 16.5° × 12.4°
  • Back focal length (BFL): 7.53 mm
  • Minimum object distance (M.O.D.): 0.20 m
  • Dimensions: Φ40.00 × 68.30 mm
  • Weight: 148 g
  • Distortion: 0.35 %

Commands and examples – verify before use:  

import picamera
import picamera.array
import cv2
from time import sleep
import numpy as np
def test_gcamera():
cv2.namedWindow("img",0)
with picamera.PiCamera() as camera:
camera.resolution = (1920, 1080)
camera.awb_mode = 'off'
rg, bg = (1.8, 1.4)
camera.awb_gains = (rg, bg)
with picamera.array.PiRGBArray(camera) as output:
for foo in camera.capture_continuous(output, 'rgb', use_video_port=True):
img = cv2.cvtColor(output.array, cv2.COLOR_RGB2BGR)
cv2.imshow("img", img)
cv2.waitKey(1)
cv2.imwrite("test.jpg",img)
r, g, b = (np.mean(output.array[..., i]) for i in range(3))
if abs(r - g) > 2:
if r > g:
rg -= 0.1
else:
rg += 0.1
if abs(b - g) > 1:
if b > g:
bg -= 0.1
else:
bg += 0.1
camera.awb_gains = (rg, bg)
output.seek(0)
output.truncate(0)
if __name__=="__main__":
test_gcamera()

Notes and version constraints

  • The source includes an OpenCV adjustment code snippet that was shared only as reference and has not been fully validated
  • The stated fields of view (FoV) depend on the sensor model used; exact values must be confirmed against the actually installed sensor
  • No information on price, availability, warranty, or certifications is present in the source material
  • The compatibility statement is limited to the IMX477 12.3MP camera and the Raspberry Pi HQ Camera; other cameras are not explicitly mentioned

Source and revision record

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