JWTechPublisher: Freigegebene technische Dokumentation veröffentlicht; Text-only und noindex

2026-09-05T22:40:31Z

Freigegebene technische Dokumentation veröffentlicht; Text-only und noindex

Neue Seite

__NOINDEX__
'''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 ==
Technical overview of the Waveshare 25mm CS lens system and its use with the IMX477 12.3MP camera or Raspberry Pi HQ Camera.

== Related products at JW Tech ==
* [https://shop.jw-tech.eu/p/WSAL18154 WSAL18154 – 25mm Telephoto Lens for Raspberry Pi High Quality Camera]

== Technical overview ==
* The 25mm telephoto lens is a CS/C lens that must be paired with a compatible camera module.
* Compatible cameras per source: IMX477 12.3MP Camera and Raspberry Pi HQ Camera.
* Lens format: 1 inch; aperture range F1.4–F16; CS-mount connector.
* Field of view (FoV) on a 1-inch sensor: approximately 44.6° × 33.6°.
* Back focal length (BFL): 17.53 mm; total track length (TTL): 67.53 mm.
* Distortion values by sensor size: 1 inch −0.7%; 1/2 inch −0.5%; 1/3 inch −0.15%.
* Minimum object distance (M.O.D.): 0.20 m.
* Dimensions: Φ39.00 × 50.00 mm; weight: 133.7 g.
* Aperture adjustment is manual via the ring on the lens body.
* The page includes an OpenCV white-balance correction code as a reference example.

'''Commands and examples – verify before use:'''
<syntaxhighlight lang="text">
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()
</syntaxhighlight>

== Notes and version constraints ==
* The source contains template placeholders such as {{{name4}}} and {{{userDefinedInfo}}}; these are incomplete and were ignored.
* The stated compatibility (IMX477 / HQ Camera) comes directly from the source; other combinations are not confirmed.
* The OpenCV white-balance function was shared by RPi Camera (G) users and serves only as a reference; it is not an official lens specification.
* No information on price, stock, warranty, or certifications is present in the source; such details must not be added.

== Source and revision record ==
* [https://www.waveshare.com/wiki/25mm_Telephoto_Lens_for_Pi 25mm Telephoto Lens for Pi - Waveshare Wiki]
* Source revision: 84349
* Captured: 2026-09-01T03:06:11+00:00
* SHA-256: <code>53de81115e4a4b5b8883a73b89aa89f7e6485a467e0f0354df5c0b3ddc3db500</code>

WSAL18154 – 25mm Telephoto Lens for Pi/en - Versionsgeschichte

JWTechPublisher: Freigegebene technische Dokumentation veröffentlicht; Text-only und noindex