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Originally Posted by dh003i
Thank you for your help everyone. I ended up going with the Sony PRS-505, but mainly because I found such a great deal on it. I'll stick with that for a while while the devices mature.
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that is often the most important consideration...congrats on a nice new reader. still follow what happens for Pocketbook as well as other brands because this week things are going to change for the better...the new large format panels from Plastic Logic and also the came out of nowhere LG panels look very impressive from the prototypes shown so far. A lot of the perceived contrast is as mentioned the temperature of the ambient light and also the overlay layers on top of the EPD (the screen itself). Slight variations in the color of the glass or plastic used can be one source of the reported variations in early devices. I suspect that differences reported these days are simply due to the color temperature and power of your reading area's ambient lighting. A daylight (~5000K-6000K,, bluer light also called truer white light) bulb with affect perceived contrast differently from a "soft white"/warmer (more yellow) bulb in the (~2700K-3000K) range.
One reason some readers look better in the store than home is most retail stores use lighting in the 4000K to 4500k range but when people get them home under a softer incandescent or CFL bulb the contrast seems lower. Take the same reader out into bright noon sun and the thing will seem perfect. But within all of that, every single person perceives color and contrast differently.
That all has to be why some of us have no problem reading on an LCD panel and others find them impossible and people like me do not care for the Vizplex panels under normal soft white lighting found in most homes...but since I have switched to all daylight CFL bulbs the K1 seems much improved. And under 5500K LED lighting the contrast is just spiffy as can be.