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If you run QuickCam_10.5.1_x64.exe normally on Windows 11, it will likely say "Operating system not supported." You must trick the installer:
Why does this matter? Because when searching for a driver for "Tessar 2.0 3.7," you will not find a file with that name on Logitech’s official site. You must search for the driver corresponding to the webcam body (e.g., C270) that houses the Tessar lens. Logitech Webcam Tessar 2.0 3.7 Driver
Resolution Limits: These older sensors may crash modern apps like Zoom or Teams if the resolution is set too high. Try 720p or lower. If you run QuickCam_10
"Logitech Tessar 2.0 3.7" is not the model name of the webcam. It is the model of the lens . Resolution Limits: These older sensors may crash modern
Modern operating systems like Windows 10 and 11 are incredibly smart. When you plug in a Logitech webcam with a Tessar lens, the system usually recognizes it instantly as a "USB Video Class" (UVC) device. It installs a generic Microsoft driver, and within seconds, your video feed works.