25mm Telephoto Lens for Pi
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(Redirected from 8-50mm Zoom Lens for Pi)
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Relate User guides
FAQ
Answer:
*In different environments, the white balance effect may not be normal. Users can adjust the parameters according to the actual usage.
- The following OpenCV adjustment code is for reference only. (The code is shared by RPi Camera (G) users)
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()
{{{5}}}
Specification of Lens
| Lens |  6mm Wide Angle Lens |
 16mm Telephoto Lens |
 25mm Telephoto Lens |
 35mm Telephoto Lens |
 8-50mm Zoom Lens |
| F/No | 1/2" | 1" | 2/3" | 1" | 1/2.3" |
| Aperture | F1.2 | F1.4-16 | F1.4-16 | F1.7-16 | F1.4 |
| Connector | CS-mount | C-mount | |||
| FoV | 63° | 1″ 44.6° × 33.6° 2/3″ 30.0° × 23.2° 1/1.8″ 24.7° × 18.6° 1/2″ 21.8° ×16.4° |
2/3" 20.2°×15.1° 1/1.8″ 16.5°×12.4° 1/2″ 14.5°×10.5° |
1″ 20.9°×15.8° 2/3″ 14.4°×10.8° 1/2″ 10.5°×7.9° |
45°-5.35° |
| BFL | 7.53mm | 17.53mm | |||
| TTL | - | 67.53mm | - | ||
| Distortion | - | 1″（-0.7%） 1/2″（-0.5%） 1/3″（-0.15%） |
0.05% | 0.35% | - |
| M.O.D. | 0.20m | 0.20m | 0.25m | 0.30m | 0.20m |
| Dimenstion | Φ30.00 × 34.00mm | Φ39.00 × 50.00mm | Φ34.00×34.00mm | Φ35.00×34.00mm | Φ40.00×68.30mm |
| Aperature Adjustment | Manual | ||||
| Weight | 53g | 133.7g | 82g | 78g | 148g |