I do use a D800 with a 50/F1.4 lens for video conf calls. A lot of the current generation DSLRs do provide XGA, 1024x768 sized preview images when tethered, as

I do use a D800 with a 50/F1.4 lens for video conf calls. A lot of the current generation DSLRs do provide XGA, 1024x768 sized preview images when tethered, as, surprise surprise, that is the resolution of their viewfinder/screen. Older cameras, like the D800, only do 640x480, though IMO that is still a vastly superior image for video conferencing. I've put together what I've found out so far at https://github.com/dognotdog/ptpwebcam/blob/master/CAMERAS.md https://github.com/dognotdog/ptpwebcam/blob/master/CAMERAS.m... Sony ILSM cameras seem to all do 1024x, DSLRs mostly do 640x480 unless they're from the last 2 or so generation of cameras. I have most complete information for Nikon, as they actually publish specs for the cameras PTP interfaces, unlike Canon or Sony, which have to be reverse engineered.