Originally Posted by mlang46
Brian so your short throw lens is a lens converter like a barstow lens
i was interested in the Planar until I saw it had Cedia 2008 and for some reason I was not impressed with the image and looking at it gave me a headache
Theoretically the dynamic iris should increase the contrast ratio and the variable intensity lamp (I do not know if you used a Vidi system or an osram system) should help with the red part of the spectrum and decrease the dither artifacts and should produce a wonderful projector
have you made any significant changes since Cedia 2008?
The screen was way too big for the room at Cedia. It was a 120" wide woven SR with .95 gain. The front row was ~8' from the screen. It was not optimal and I appologize for this.
We use a UniShape lamp waveform implementation which improves color and bit depth.
Variable Plateau: The lamp brightness is changed for each segment of the color wheel. Using this method, we can achieve an almost perfect D65 color wheel using a mercury lamp without compromising the color saturation, something which was not possible before.
Low Pulse: The lamp brightness is dropped to 50% twice during each color wheel revolution. During this time the DMD is processing only that part of the image which is below 50% brightness. The DMD is gained up 200% to take advantage of the full brightness range and processes the image at its full bit depth capabilities. Using this process, 1 additional bit is added to the image, reducing dithering in dark areas by 50%.
Here are some other factoids regarding this platform:
Each projector is individually calibrated on the production line using a six axis color correction for white point and proper color gamut. Manual controls for RGB gains, offsets, and color temperature are also available.
DynamicBlack provides higher contrast and bit depth, improving total image quality.
This control's default setting is on.
When turned on, full field contrast levels are boosted approximately 3x. To do this, 3 steps occur for every frame of content:
1. The image is analyzed for brightness content
2. If the image does not use the full range of brightness, the range will be expanded to fit the range of the DMD. This is similar to an auto leveling function of photo editors like Photoshop.
3. An aperture is closed to one of more than 200 possible positions so that the peak brightness matches the original (pre-expanded) image. This means that even though light is being blocked by the aperture, the apparent brightness of the image does not appear to change.
Because the entire brightness range of the DMD is used during dark scenes, DynamicBlack can add up to 1.6 additional bits to the image. This reduces dithering artifacts substantially.
It is important to note that not all implementations of DynamicBlack (or so-called dynamic apertures) operate the same. Unlike others, the DynamicBlack subsystem in the PD8150 and PD8130 uses a very low mass actuator and operates at the incoming frame rate of the signal. It is driven by a process similar to that used for a hard drive head to make sure that the actuator position, speed, and reliability are optimal. Planar has conducted extensive design studies and validation tests to ensure that image artifacts are as few as possible.
Note that due to the dynamic nature of the optical aperture, some standard test methods for determining projector performance will not work properly. Please turn DynamicBlack off if you want to calibrate the contrast control or measure the projector gamma using individual gray level test images.
High speed color wheel reduces artifacts for some people.
The color wheel runs at a 6x multiple of the frame rate. This means for 60Hz sources that the actual projector frame rate is 360Hz and for 50Hz sources it is 300Hz. For people who are sensitive to flicker or color sequential breakup (the so-called rainbow artifact), these are greatly reduced at this frame rate. Unishape also helps reduce this effect.
High in-field contrast optical engine makes images more life-like.
The optical engine produces a typical ANSI checkerboard contrast of over 500:1. This signifies low crosstalk and stray light. A high ANSI contrast is the most important industry-recognized measure for the 3-dimensionality of an image.
Projection Lens filter thread allows for brightness optimization in small rooms.
The projection lens is equipped with threads for a 72mm standard SLR type filter. We recommend using an ND2 filter here for situations where the on-screen brightness exceeds 40 foot-lamberts at full white. Most content is not designed to be viewed at such high brightness levels, and artifacts in the source such as macroblocking can be easily seen when the image is above this brightness.
Horizontal and Vertical lens shift allow for distortion free image movement.
The projection lens can be moved vertically and horizontally (the PD8130 has vertical shift only). The range is +120% to -50% vertically, and +/-15% horizontally. This is implemented instead of the more traditional electronic keystone correction since it is purely optical and does not create the scaling artifacts that electronic correction does.
Here is a general list of features for these projectors
Stunning piano-black ID with metal-flake and multiple layers of clear coat
Oversized optics for superior image uniformity and clarity
Super low noise and light pollution cabinet design - limits stray light output to less than 50% of the brightness of projected black - Built-in sound dampeners - Shock mounted components - Angled side vent louvers to direct ventilation away from customers - Oversized fans for lowest noise level possible - Sleeve bearing color wheel for long life and silent operation and zero pure tones
Sixteen HD video timings; eight for1080p including 1080p 24Hz
Six position full HD PIP & PBP
Automatic ceiling mode detection
NegitivePulse (UniShape) lamp technology for increased color bit depth
Resize modes for 2.35:1 anamorphic lens use
Two selectable IR codes built-in, plus ability to disable IR
I/O panel illumination LED activated via remote
ISF day and night calibration memory settings
Ten individual sharpness controls
NightVision red backlighting on remote control
Lens shift controls under top mounted trap door
Threaded focus ring for adding Neutral Density filter
12v trigger(s) that can be assigned to six separate functions - lamp on/off, 4 resize modes and RS-232
Four individual noise reduction controls
Calibrated to D65 standards out-of-the-box
Selectable DLP frame rate control - Auto, 48Hz, 50Hz, 60Hz
DynamicBlack for superior frame-by-frame black level adjustment
Adaptive contrast using electronic contrast enhancement
BrilliantColor for increased color brightness
Two lamp wattage choices - 4000 hour life and 2000 hour life
Auto-power on mode when AC is detected - Wall switch compatible
Five programmable source selection keys
Three programmable image memory selection keys
Eleven Built-in test patterns
Blue-only mode for calibration
Four level translucent menu
Lamp can be replace while projector is ceiling mounted
Field upgradeable software
Intelligent service menu for advanced troubleshooting
Serial number visible while ceiling mounted and via OSD
Sealed optical system and no filters necessary
Included polishing cloth
No routine maintenance is required
Beveled cable cover for easy table-top demonstrations and a super-clean installation
Centered lens for uniform look and easier installations
Five position OSD, with 12 supported languages
Hope this helps.