WHE46@ccvax.iastate.edu (Marc Barrett) (10/27/90)
In Message <1990Oct26.044011.18815@cunixf.cc.columbia.edu> Marcus Dolengo <md41@cunixb.cc.columbia.edu> writes: >All this talk about the Amiga's flicker, when yesterday I went to a computer >room at columbia <@ IAP btw> where there were alot of macs being used <mac IIci >s i think, B&W display though> and I noticed quite a few were flickering show- >ing normal ordinary text.... although I was 15 feet away, I thought it was very >bad and strange coonsideing MB's ranting about how "clear the mac display is" >as is compared to the A500.... btw when you wanna compare the A500 to the mac + >wouldnt it be fair to use a B&W monitor for the Amiga? :-) This is a sort of optical illusion, resulting from how far away you were standing from the monitor. If you had been closer to the monitor of the MAC, you would not have noticed any flicker. I work most of the time in a computer lab which in a very large room, with computers and terminals throughout the room. I noticed a long time ago that, if I look at a monitor screen that is on the other side of the room, the screen appears to flicker greatly, even though the same monitor appears to have a totally rock-solid non-interlaced display when I am close to it. I have asked other people about this, and they said that they noticed the same thing, so I know it is not anything that is wrong with me. If you want proof, try this: put your Amiga into a non-interlaced resolution mode, preferably NTSC if possible (non-interlaced NTSC gives you the most rock-solid display possible on the Amiga). Now, stand about 15-20 feet away from your monitor and look at it. You will notice some flicker; your will notice more flicker the further way you stand from your monitor. I have a theory that the human eye is more suseptable to flicker from light sources that are a distance away, though I may be wrong. >------------------------------------------------------------------------------- > o o | This Space For Rent Only Amiga!! // ><< md41@cunixb.cc.columbia.edu >> | Amerikkka's Most Wanted \\ // >/> <\ | \X/ >------------------------------------------------------------------------------- >"I think out actions _show_ what's in our hearts." Hobbes >Who's the Mack... -MB-
rjc@wookumz.ai.mit.edu (Ray Cromwell) (10/27/90)
In article <34686@nigel.ee.udel.edu> WHE46@ccvax.iastate.edu (Marc Barrett) writes: > >In Message <1990Oct26.044011.18815@cunixf.cc.columbia.edu> Marcus Dolengo ><md41@cunixb.cc.columbia.edu> writes: > >>All this talk about the Amiga's flicker, when yesterday I went to a computer >>room at columbia <@ IAP btw> where there were alot of macs being used <mac IIci >>s i think, B&W display though> and I noticed quite a few were flickering show- >>ing normal ordinary text.... although I was 15 feet away, I thought it was very >>bad and strange coonsideing MB's ranting about how "clear the mac display is" >>as is compared to the A500.... btw when you wanna compare the A500 to the mac + >>wouldnt it be fair to use a B&W monitor for the Amiga? :-) > > This is a sort of optical illusion, resulting from how far away you >were standing from the monitor. If you had been closer to the monitor >of the MAC, you would not have noticed any flicker. > > I work most of the time in a computer lab which in a very large room, >with computers and terminals throughout the room. I noticed a long time >ago that, if I look at a monitor screen that is on the other side of the >room, the screen appears to flicker greatly, even though the same monitor >appears to have a totally rock-solid non-interlaced display when I am >close to it. I have asked other people about this, and they said that >they noticed the same thing, so I know it is not anything that is wrong >with me. > > If you want proof, try this: put your Amiga into a non-interlaced >resolution mode, preferably NTSC if possible (non-interlaced NTSC gives >you the most rock-solid display possible on the Amiga). Now, stand >about 15-20 feet away from your monitor and look at it. You will >notice some flicker; your will notice more flicker the further way >you stand from your monitor. > > I have a theory that the human eye is more suseptable to flicker >from light sources that are a distance away, though I may be wrong. > > >>------------------------------------------------------------------------------- >> o o | This Space For Rent Only Amiga!! // >><< md41@cunixb.cc.columbia.edu >> | Amerikkka's Most Wanted \\ // >>/> <\ | \X/ >>------------------------------------------------------------------------------- >>"I think out actions _show_ what's in our hearts." Hobbes >>Who's the Mack... > > > -MB- Sorry MB, I just tried this experiment, in fact I almost walked out of my house doing it. On my 640x200 screen I noticed no flicker. Perhaps the reason its caused on the Mac is because the Mac's screen is interlaced. (90hz or so I'm told.) An American in England will probably notice a flicker on PAL 50hz interlaced TV. The higher the scan rate, the less the flicker. Another reason could be 9" monitors. I doubt you could see a flicker on a handheld television. -- "NeXTs are useless... Mac's are irrelevent.. IBM's are futile. Amiga's,however, are quite nice!" -Capt Jeal-Luc Amiga | Flames to /dev/null Ray Cromwell rjc@wookumz.ai.mit.edu | // AMIGA! \\ "Your software will adapt to service ours!"| \X/ AMIGA! \X/
navas@cory.Berkeley.EDU (David C. Navas) (10/29/90)
In article <@nigel.ee.udel.edu> WHE46@ccvax.iastate.edu (Marc Barrett) writes: > This is a sort of optical illusion, resulting from how far away you >were standing from the monitor. If you had been closer to the monitor >of the MAC, you would not have noticed any flicker. I dunno, a lot of Mac users use those silly smoke-screen devices in front of those 9 inch monitors as well... I believe that you will find that what is responsible is not the distance, but the flourescent lighting. It tends to beat with the display making what was a small interlace problem into an intolerable one. Ever looked at a SUN monitor from one of it's corners in a flourescently lit room? Talking about flicker, SHEESH! :) The idea, I think, is to get into a position where the lighting reflects off the monitor's glass. Therefore your challenge, which is undoubtedly taken up by folks eager to flame the -MB- beast, may not get the results you expect. David Navas navas@cory.berkeley.edu "Excuse my ignorance, but I've been run over by my train of thought." -me (and Calvin)