Wide Angle Lens For Logitech C920

• Logitech C920 Webcam Settings
• Wide Angle Lens For Logitech C920 Webcam Software
• Logitech C920 C
• Logitech C920 Focal Length

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I realized today that the Logitech C920 webcam produces images covering a different field of vision (FOV) for the same width based on the height. I was expecting the horizontal field to be the same for a given width but it was not.

Using the command ffmpeg -f video4linux2 -list_formats all -i /dev/video0 to retrieve the sizes of video available lists the same set of sizes for h264 and mjpeg. 640×480 160×90 160×120 176×144 320×180 320×240 352×288 432×240 640×360 800×448 800×600 864×480 960×720 1024×576 1280×720 1600×896 1920×1080. In Raw/yuyv422 mode two additional sizes are available. 2304×1296 2304×1536.

I pointed my webcam at the building out my window, giving myself a rough grid pattern to look at and ran it through all of the h.264 sizes, and manually counted the horizontal and vertical blocks visible.

Logitech Webcam Properties The Logitech Webcam Properties (Advanced) window has 3 tabs: Webcam Control; Advanced Settings; Device Info; Webcam control: Zoom — Click and drag the slider upwards to zoom in and downwards to zoom out. You can also use the zoom in and zoom out buttons to change the focal length of the lens. Nice wide angle, which is good for video chatting with multiple people in the room; Webcam software has great video adjustment controls, but lacks audio controls. It has a 6 foot cord so there is plenty to work with here for positioning around your work area. Sound recording is. Often compared with Logitech C920. Microsoft LifeCam HD-3000. Logitech C922 Pro Stream. Trust Verto Wide Angle HD Video; Kraun KR.5L; Popular comparisons. LOGITECH C920 WEBCAM ULTRA WIDE ANGLE LOGITECH C920 WEBCAM ULTRA WIDE ANGLE 00062 Free. Weight: 5.71 kg. LENS CONSTRUCTION. Focus Adjustment.

I expected 640×480 and 640×360 to be the same horizontal FOV but have different vertical FOV. What actually happened in the FOV was that they displayed the same vertical FOV but different horizontal FOV.

I ran through all of the h264 resolutions, and the vertical FOV appeared to shrink slightly when I requested resolutions below 200, but otherwise stayed the same.

Logitech C920 Webcam Settings

Selecting 2304×1536 produced a slightly larger vertical FOV with the same horizontal FOV as 1920×1080. 2304×1296 seemed to produce the same FOV in both directions as 1920×1080. Both of these resolutions run at lower frame rates and only in raw mode. Best vst for ableton live 8. I was testing them using ffmpeg transcoding and sending to my windows desktop with the command: ffmpeg -re -f v4l2 -video_size 2304×1536 -framerate 2 -input_format yuyv422 -i /dev/video0 -f mpegts udp://192.168.0.10:8090

Wide Angle Lens For Logitech C920 Webcam Software

The C920 advertises a Diagonal FOV of 78°, but I didn't find official meaning of that. I found a nice bit of information at http://therandomlab.blogspot.com/2013/03/logitech-c920-and-c910-fields-of-view.html that describes it as explicitly as being when the camera is running in 16×9 mode.

Logitech C920 C

I will probably get around to writing a program to more accurately produce the results. Here's my manual table:

Logitech C920 Focal Length