I made the same assumption until others corrected me. On Feb 28, 2014, at 5:17 PM, Robin Wilton <[email protected]> wrote:
> With apologies for one further mail on this topic... Steve is right, and I > stand corrected. > > As far as I can determine, the light sensor on a MacBook Air (well, mine, at > least) is about 1-4mm to the left of the webcam aperture in the screen > surround. > > This means that you can block the webcam without interfering with the > automatic screen brightness function - but you need to position your > webcam-blocker as carefully as in Steve's picture, and from the right of the > lens aperture. > > Serves me right for (a) making assumptions and (b) using my left thumb to > occlude the lens. If I had used my right thumb, I wouldn't have made the same > assumption (!) > > Thanks Steve! > > Robin > > On 28 Feb 2014, at 16:52, Robin Wilton wrote: > >> Apologies - I should have been more specific... my Macbook Air doesn't have >> a separate light sensor... it's in the same orifice as the camera lens. >> >> R >> >> Robin Wilton >> Technical Outreach Director - Identity and Privacy >> Internet Society >> >> email: [email protected] >> Phone: +44 705 005 2931 >> Twitter: @futureidentity >> >> On 28 Feb 2014, at 14:54, Steven M. Bellovin wrote: >> >>> >>> On Feb 28, 2014, at 2:41 PM, Suhas Nandakumar <[email protected]> wrote: >>> >>>> >>>> (incidentally, if you're using a Mac and you cover the webcam lens, you'll >>>> need to turn off the automatic screen-dimming function. System Preferences >>>> -> Displays ) >>>> >>> >>> Not really -- the light sensor on many Macbooks, at least, is to the left >>> of the camera lens. This just came up on Twitter; here's my set-up at >>> https://twitter.com/SteveBellovin/status/439412122410184704. (I don't want >>> to clog the list with a large picture attachment.) Yes, it works, and if >>> you find me here I'll show you what happens if I move the slide to the left >>> a bit more. >>> >>> >>> --Steve Bellovin, https://www.cs.columbia.edu/~smb >>> >>> >>> >>> >>> >> > > _______________________________________________ > Strint-attendees mailing list > [email protected] > http://lists.i1b.org/listinfo.cgi/strint-attendees-i1b.org --Steve Bellovin, https://www.cs.columbia.edu/~smb
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