“what is the difference of an HD webcam that is 1080p and the C505 at 720p. what is the main difference between the C505 HD & the C270 HD”
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You're difference between a 1080p webcam and a 720p webcam will mainly be the picture quality. A 1080p webcam is going to look better than a 720p webcam. Plus the 1080p webcams, generally, have a better microphone on them. The main difference between the C505 and the C270 is really only going to be the length of the USB cable. The C505 has a 7 foot cable and the C270 has a 5 foot cable. Otherwise, the have the same picture quality, microphone, and field of view.
Sorry, there was a problem. Please try again later.For me, the C270 had a major issue with Windows 10. If the computer sleeps and wakes up, trying to use the camera resulted in BSoD. Only way to fix the problem was to do a hard reboot of the computer. The C270 worked without any problem with my Macbook. Apparently, the driver for the C270 is old and Logitech doesn't seem to want to fix this issue. I bought the C505 as a replacement and no longer have the BSoD issue after the Windows 10 computer wakes up from sleep. Perhaps this is their strategy. Force people to pay about 2X for pretty much the same webcam so that it works properly with Windows 10.
Sorry, there was a problem. Please try again later.For things like Zoom/Skype/Teams video calls, a 720p webcam is fine and can help save some bandwidth compared to a 1080p camera. You likely won't notice a difference in video quality as Zoom/Skype/Teams compress the video feed anyways.
Sorry, there was a problem. Please try again later.720p is technically "lesser resolution" but it is still a high definition (HD) class of camera. 1080 offers better resolution if all other factors are equal (i.e. lens quality, lighting, recipient screen, streaming quality...and an app that can support 1080). My experience is that when in a standard video call, lighting/focus/microphone are more important than 720 v. 1080. I have not compared the C505 and the C270 directly, however, the key feature with the C505 is the "long range omni-directional microphone." I can attest to clarity when more than 1-3 feet from the camera. I tend to pace in my office when on a video call. The microphone picked me up very well no matter were I stood--even if I was behind the webcam. You also get 2 extra feet of USB cable with the c505.
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