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Owen

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  1. People, put the cash towards something useful, like a couple of movies. A light meter won't tell you what you like so its pointless IMHO, one person will find a given light output too bright and another too dim, its all subjective so forget about measurements. I have owned calibration gear for more than 15 years and NEVER bother with light measurements, the picture either looks right or its doesn't, I don't need a light meter to tell me. 30ftl is Standard Dynamic Range by the book, it's what 1080 Bluray disks are mastered for. On a big screen 30ftl can look too bright, with s
  2. +1 These UST "laser" projectors use single chip DLP projection systems that provide very poor contrast and are NOT true 4K, so don't be taken in by marketing BS. An old used decent quality 1080 conventional projector will provide better image quality at lower cost. They do serve a purpose for those who are just looking for a big screen image at relatively low cost, can't accommodate a convention projector and are not too fussy about picture quality.
  3. The colour filter CANNOT cause "yellowing", it affects all output levels equality. EVERYTHING you view on a projector is SDR, like it or not. The colour filter significantly reduces light output making "HDR" even more impossible. To get something closer to HDR the wide gamut filter MUST be disabled, don't worry you will never notice any difference in colour.
  4. Neither optics nor iris opening affects colour temperature (yellowing), show me a camera lens that shows such properties. Lamp dimming most certainly does cause yellowing, and since native contrast is lacking in the NX5 and NX7 it would seem JVC is dimming the lamp in dark scenes on those models in an effort to get more acceptable black levels. The NX9 has better native contrast and can get away without dimming the lamp and therefore does not suffer yellowing. The previous E-Shift models "X series" had much better contrast than the "N series" and did NOT use lamp dimming, therefore
  5. Not if they are smart. Contrast over pixels.
  6. Since no one else has chimed in I think I should. The video is a good example of why side by side comparisons like this are BAD idea, especially when no effort has been put into equalising gamma between all the projectors, and that was NOT done. Anyone wonder why the JVC looks so dark in this comparison even though the peak white level is the same as the other two projectors afters calibration? I'll tell you why, its because gamma was NOT equalised. If gamma was adjusted at all it was done "by the numbers" using calibration software, and since the JVC has the lowest black level
  7. Rainbow effect will never be a "thing of the past" with single chip DLP systems because they are incapable of displaying more than one colour at a time, which is the reason for the rainbows. They MUST time share a single imaging chip to create the 3 primary colours. 3 chip systems (LCD, SXRD, D-ILA) simply don't have that issue because that have a separate imaging chip for each of the 3 primary colours so display ALL colours simultaneously without issue. No rainbows are possible and the image is not fatiguing to the viewer. The visibility of "rainbow effect" is also up to the indivi
  8. The native contrast of ALL so called "4K" DLP projection systems is significantly worse than the 1080 models they are supposed to replace. Low native contrast is an inherent problem for ALL DLP projectors at ANY price, and the move to "4K" has has taken DLP contrast performance back 10 years or more. Increasing the number of micro mirrors to get closer to, but never equal to "4K", introduces many more mirror edges to refract light and degrade contrast, nothing a dynamic iris system can do to fix that.
  9. The French review of the Benq W2700 reveal its significant performance short comings. Lumen output after colour calibration = 981 lumens on high lamp and 725 on low lamp, a LONG way from the advertised 2000 lumens. Thats a worse than normal light loss after calibration for DLP projectors. If wide gamut colour is used output drops to 609 lumens in high lamp mode, bloody useless. Native contrast ratio comes in at a staggering 991:1 native (in scene contrast). Yes thats LESS THAN 1000:1 people, and thats worse than most cheap 1080 DLP projectors. Dynamic contrast (sc
  10. Sorry mate, but must I always have to point out the obvious ? The test pattern image you posted above does NOT show 4K. The left side block shows a 2K horizontal pattern NOT 4K, and the right side pattern is 2K vertical resolution. To be fully resolved the alternating lines must be full black and full white which equals 100% MTF (or no loss). White lines that are grey and black lines that are grey represent a loss of MTF and "resolution". The closer the lines get to 50% grey the greater the loss of MTF and usable resolution. Here is the full test pattern.
  11. If any manufacturer-distributor-retailer tells you that ask for the "specifications" in detail that state what level of colour non uniformity is "normal" so you can get an independent evaluation and watch them back down. Poor screen uniformity is a defect plain and simple, and if they can't fix it you are entitled to a refund as the projector is not suitable for purpose.
  12. Ok, I'll make it simple guys. A "TRUE" 4K - native 4K (call it what you will) projector can resolve a 4K resolution test pattern. None of the projectors using a shift system can do that, all they will display at 4K is a grey blur in stead of alternating black and white lines. Sony 4K projectors don't resolve the 4K test pattern either because they use so called "convergence" correction by default and the user can't turn it off. There is a service menu fix for this but it may void warranty if the user plays around in there. Have the dealer do it. The "TRUE" 4K JVC's do
  13. The pixels still overlap mate, and each pixel is around 4 times larger than it should be so no TRUE 4K.
  14. Yes it is 1080p and low lumens but it has much higher native contrast and a much darker native black level. Any projector can "do HDR", you just need to do the appropriate tone mapping externally. PC based tone mapping is ahead of anything used in current projectors. Even cheap data grade projector lenses can resolve 20K plus, if they did not you would not be able to see the black gaps between the pixels. What matters to the human perception of image sharpness is the MTF performance of the lens at MUCH lower spatial frequencies down around 1K. The thing is, digital sha
  15. To be described as "TRUE" 4K the layout of the pixels must exactly match the domestic "4K" standard of 3840x2160 for 1:1 pixel mapping. The Texas Instruments system does not do that so the image must be scaled to fit the non standard pixel grid. On top of that, the shift system moves the pixels diagonally half a pixel and projects the second set of "shifted" pixels overlapping the first set. Each shifted pixel overlaps the corners of 4 of the first set of pixels as there is no space to put them without doing this. A "True" 4K projector does not have this pixel ove
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