25mm Telephoto Lens for Pi
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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()
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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 |