NTSC versus PAL
in [Repair]
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From: Dave Plowman (News) on 8 Apr 2010 04:13 In article <ef738ef2-efc9-4f66-a95e-b5d65cc67132(a)v20g2000yqv.googlegroups.com>, <stratus46(a)yahoo.com> wrote: > I thought TK-44s had plumbs. I _know_ that TK-45s had plumbs as I have > a used one from a TK-45. The TK-28 film camera had vidicons but AIUI, > the vidicon had its own level non-linearity that was not present in > plumbicons (Leddicons for you EEV fans) or Saticons. Vidicons required > different electronic gamma to achieve an overall gamma of 2 to 2.2. > For a film camera the vidicon issue wasn't as bad as the light levels > were much more predicable. You can look at some of the dinosaurs here. > http://www.oldradio.com/archives/hardware/TV/RCA-TV.htm Thames TV (the makers of Benny Hill) replaced their venerable EMI 2001 with TK 47 at their Teddington studios. Not much liked by the camera operators as their larger size made some studio shots impossible. -- *Don't byte off more than you can view * Dave Plowman dave(a)davenoise.co.uk London SW To e-mail, change noise into sound.
From: isw on 9 Apr 2010 01:30
In article <5104a4f5c7dave(a)davenoise.co.uk>, "Dave Plowman (News)" <dave(a)davenoise.co.uk> wrote: > In article <isw-D8D39A.22002707042010@[216.168.3.50]>, > isw <isw(a)witzend.com> wrote: > > In article <hpibre$pjs$1(a)news.eternal-september.org>, > > "William Sommerwerck" <grizzledgeezer(a)comcast.net> wrote: > > > > > Registration on cameras. Convergence on monitors? > > > > > > Yes. Thanks for the correction. > > > > > > > > > > Did you have videcon colour cameras? First UK ones > > > > were Plumbicon. > > > > > > Yes, because you started so late. > > > > > > The first RCA cameras used vidicons (I think) -- though they might > > > have used image orhticons. > > > Iconoscope first, then orthicon, then image orthicon. Vidicons were > > first used for film chains, and later as the color (as opposed to > > luminance) pickups in *some* cameras. > > Are you saying there were iconoscope colour cameras actually in use? Of course not. I was responding to "The first RCA cameras used vidicons" -- nothing about color. But now I think about it, I suppose it's possible that some of the early CBS field-sequential color work was done with iconoscopes -- or even image dissectors... Isaac |