Logitech C920 Webcam Review
Logitech C920 webcam review
2018-06-22 my webcam arrived.
Summary: no buy.

marketing blurb:
- Full HD 1080p video calling (up to 1920 x 1080 pixels)
- H.264 video compression
- Built-in dual stereo mics with automatic noise reduction.
- Automatic low-light correction
- Tripod-ready universal clip fits laptops, LCD or monitors
- Compatible with: Windows 7, Windows 8, Windows 10 or later. Works in USB Video Device Class (UVC) mode: Mac OS 10.6 or later (HD 720p on FaceTime for Mac or other supported video-calling clients; Full HD 1080p video recording with QuickTime Player) Chrome OS,Android v 5.0 or above (with supported video-calling clients),USB port,Internet connection
Logitech C920 Cannot Focus Near Objects
BAD. All the review sites say it's best. I bought it. It has problem focusing correctly for anything within a forearm length. It can focus correctly if something is really close, like 5cm, but when you bring somethnig close, such as a keyboard, within 50 cm but not as close as 5cm, it tries to auto focus but its final choice is blurry. Lots one star ⭐ reviews have similar complaints. Also, the other model C922x, isn't better.
here's a video made with the Logitech C920 Webcam.
you can see, the video is blurry.
If you search reviews, many sites says the logitech C920 is the best. Either lie, or paid reviews, or reviews churned out by clickbait commercial sites. These days, its hard to find proper review.
by the way, the logitech C922x have the same focus problem.
I've also read reviews of other expensive logitech ones. This one logitech brio webcam for $200. It's crap.
Logitech C920 vs Spedal Webcam MF934H
Note that as of today, 2021-09-27, The logitech is $74, and Spedal is $41, on amazon.


- The Logitech has 2 big blue light in a bracket shape when the cam is on.
- The Spedal has 1 tiny red light dot when the cam is on. If you are not directly looking at the the cam, you cannot see it.
Wide Angle Comparison
The Spedal has wider angle than Logitech, and no fisheye lens distortion.

Resolution/FPS set to 1024x576 for both.
Under day light + LED light.
Cameraspositioned side by side on top of monitor.

Default resolution/FPS for both. Under day light + LED light.
Low Light Comparison
Logitech is better at low light.

Default resolution/FPS for both.
Under normal brightly lit room, at night. The lamp in the background has red bulb.
Cameras placed 20cm apart, on top of the monitor.

Default resolution/FPS for both.
Under red lamp lighting, at night.
Cameras placed 20cm apart, on top of the monitor.
macro shot
Logitech auto focus does not work well when closer in forearm length. Also, the video becomes fuzzy whenever you move, because it's trying to adjust focus.
The Spedal is manual focus. It's a joy to use, no constant fuzzy problem. You actually do not need to manually adjust the focus. Just adjust it once, and it wors ok. If you are a video professional who actually want manual focus, you need to buy more expensive real cameras, not webcam.

Camera 10cm to object.

Camera 10cm to object.
Cheap Webcams
There are lots cheap webcams there, and it seems, they are not bad.
Jan 23, 2020
by Alpha Gaming
Conclusion: never buy logitech webcam