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Re: Sony VPL-HW50 | SXRD | 1080p
Iniciado por NeogeoG
Aquí unas medidas de negro profundo con una minolta T-10 por si te interesa de un HW50 (con iris dinámico activado y sin éste), además del de un JVC X70:
El HW50 con iris dinámico activado se midió un negro de 0.0008 ft-Ln (se tuvo que utilizar una Minolta T10 ya que la TS100 no podía medir unos negros tan profundos. Con el iris fijado para que diera 17.55 ft-L el negro subió a 0.0065 ft-LSony VPL-HW50ES 3D SXRD Projector HT Labs Measures
HT Labs Measures
Full-On/Full-Off Contrast Ratio: 20,894:1
Except as noted, all of the measurements (and charts) here are for 2D operation and were taken on a 96-inch-wide Stewart Filmscreen StudioTek 130 screen (gain 1.3). The projector was in the low lamp mode, the Advanced Iris was on Auto Full, the Contrast Control was on 70, and there were approximately 160 hours on the lamp.
The above contrast ratio was taken with the projector positioned at approximately 14 feet from the screen using a Minolta T-10 light meter to measure directly off the lens. The peak-white level on the screen was 17.58 foot-lamberts measured with a Minolta LS-100 light meter. From these two measurements, we calculate that the black level on screen was 0.0008 ft-L. (The LS-100 will not measure below 0.001 ft-L, thus the reason for the two-meter interpolation.)
Using the same technique, with the Advanced Iris turned off and the manual iris set for an onscreen brightness of 17.55 ft-L, the black level increased to 0.0065 ft-L, and the full-on/full-off contrast ratio dropped to 2,710:1.
Sony VPL-HW50ES 3D SXRD Projector HT Labs Measures | Home Theater
JVC Procision DLA-X70R D-ILA 3D Projector HT Labs Measures
HT Labs Measures
Full-On/Full-Off Contrast Ratio: 10,727:1
All of the measurements here were taken with the projector in the User Picture Mode, calibrated and adjusted for the most accurate image. For the above contrast-ratio reading, the Lamp Power was in High, the Lens Aperture (iris) wide open (0), and e-Shift On.
The Full-On/Full-Off contrast ratio above (sometimes referred to as the peak contrast ratio, the sequential contrast ratio, or the dynamic range), was not the best we’ve seen from a projector. I can only refer to the measurements I made on the DLA-HD950 in early 2010—a peak contrast ratio of 12,546:1 on a different, smaller screen, with the Lens Aperture much lower and the lamp on Normal. Considering the fact that the DLA-HD950 was 2D only, however, the measurements here are relatively consistent with my past results on JVC projectors. With a peak brightness level of 15.72 foot-lamberts on the DLA-X70R (High lamp setting, Lens Aperture wide open), that translates to a black level of 0.0015 ft-L on the 101-inch-wide Elite screen, the measurements taken with about 275 hours on the lamp and the projector about 13.5 feet from the screen.
Con un pico objeto de 15.72 ft-L el valor de negro medido fue de 0.0015 ft-L en el X70
JVC Procision DLA-X70R D-ILA 3D Projector HT Labs Measures | Home Theater
Valores que coinciden a groso modo con lo comentado en proyectorreview de que el HW50 con iris dinámico activado da un negro más profundo (aunque pierda cierto rango es interesante para las escenas más oscuras). Sin iris dinámico activado su valor de negros es menor
Aquí tiene los valores medidos en un VW90ES:
Sony BRAVIA VPL-VW90ES SXRD 3D Projector HT Labs Measures
HT Labs Measures
For the picture settings used in this review, go to HomeTheater.com. Except as noted, all of the measurements were taken with the projector in User mode, adjusted for the most accurate image, with the Lamp Control on Low, the Gamma Correction on Gamma 3, and the Advanced Iris set to Auto 1. There were just under 200 hours on the lamp. The screen was a Stewart Filmscreen StudioTek 130, 78 inches wide, with a gain of 1.3.
The full-on/full-off contrast ratio shown above was first measured directly off the projection lens using a Minolta T-10 (illuminance) light meter (the value shown here is the average of three separate, closely clustered results). Additionally, a White foot-lambert reading of 17.61 was taken off my 78-inch-wide Stewart StudioTek 130 screen using a Minolta LS-100 (luminance) spot light meter. A Black level on screen (0.00044) was derived by using that reading together with the full-on/full-off contrast from the T-10.
With the Auto Iris off, in the Low lamp mode and Gamma 3, the VPL-VW90ES produced a contrast ratio of 11,219:1 (17.7 ft-L white, 0.0016 ft-L black—using the same derivation method as above). These black and white levels apply only to a screen of this size and gain (1.3); the full-on/full-off result is specific to the projector at the settings indicated, irrespective of the screen.
The black level on the full screen is well below a level directly measurable with any meter available to us.
The T-10 should provide a more accurate result from this method compared to the method we’ve used previously, so comparisons to black levels and contrast ratios in earlier reviews should be made with care. But even allowing for that, this VPL-VW90ES’s full-on/full-off contrast ratio and black level are the best I have yet measured on a video projector
Sony BRAVIA VPL-VW90ES SXRD 3D Projector | Home Theater
El VW90ES incluso con el iris dinámico en off da un negro prácticamente clavado al que midieron en el X70, de 0.0016ft-L vs 0.0015ft-L. Con el iris activado en el VW90 se calcularon valores de 0.00044...
Esto explica porqué saboke comenta que no echa de menos el negro de su ex-JVC X30 con su nuevo VW95ES (que es casi clavado al VW90ES).
Un saludete
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