![]() Hold on… Not to be cruel, but if I had an AC projector, I'd be looking for an LC projector. ![]() I'm not sure how much it will reduce halos - probably just a little at the top and bottom of the screen - but it would be worth trying. ![]() It would definitely be worth trying, and I'd definitely do it if I still had an AC projector. It would be very easy with an AC projector to cut some nice black PVC (or PVC with black Fidelio velvet laminated on) to fit between the tube face and rear lens element. I was always going to do the mod on my G70 to see if I could see or measure any difference in ANSI, but never got around to it. I assume the engineers tested and found some improvement (I'd guess a small overall increase in ANSI contrast), or they wouldn't have bothered with the modification in the first place. NEC XG LC projectors had some small strips of tape added at the top and bottom of the C-element. If you could disassemble the lens and insert an aperture, the net effect would darkening the halos, but also reducing the overall light reaching the screen, and CRT ain't so hot in that area to begin with. There's no way you could use any kind of disc as an aperture because you'd have to do it inside the lens. So, instead of an obvious halo, it just has the effect of reducing ANSI contrast with a mostly invisible visible "halo" larger than the screen. An LC setup avoids the most glaringly (excuse the pun) visible part of the problem by using a convex lens, so any light that does reflect back toward the tube face is spread out over a much larger area. It's also a cumulative effect, meaning there isn't just one bounce that bounce happens several time until it fades out. The halos are caused by light reflecting back off the rear lens element on the lens, back onto the tube face and lighting up the phosphor. can you replace the glycol in the front of the 8" AC tubes with the tinted stuff and improve color? It'll take me forever to do anything (if you haven't noticed), but the HT hobby is swinging back into place now that winter is coming. then it doesn't really exist, does it? Oh wait. You're just going to outdo my stack, aren'tcha?Įrr. It will block some of the halos, but not all. Yep, I've had a few sets in where black matte paper blocks all of the tube face but the used area of the raster. does stacking them reduce the halo, or is it just additive and it shows up anyways?ĭual Marquee 9500LC Ultras, Dual JVC RS600 I bet there's some kind of a little trick.Īnd, suppose you stack four 8500 Ultras. Just like the iris of a camera, when stopped down, gives you better (sharper, more contrasty?) pictures.Ĭan't one add a disk like this to the lens system? Or is the halo effect created right in the glass of the front of the tube? I could have sworn there was some thread about adding a stray light mask into the optical path of an 8500, like a black disk with a hole in the center.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |