Originally Posted by mrlittlejeans
I guess my question revolves around whether its best to achieve maximum Y by being square with the screen and farther away or closer to the screen but hitting at an angle so the sensor misses its shadow. I started about 3-4" from the screen with the sensor tilted up and then moved the sensor on both axes (sp?), until I achieved maximum Y. However, I can get a higher Y by moving the sensor farther from the screen and pointed closer to perpendicular. I just don't know how far from the screen I can go and still get an accurate reading.
That's the beauty of this sort of positioning: You don't have to worry about having the sensor see its shadow as soon as it sees it's shadow the Y value will drop. In order words, don't worry about the shadow... just move it around to max out Y. When Y is maxed out, it won't be seeing the shadow. Simple!
Originally Posted by clicq
Thanks for the guide; I'm new to this and it really helped.
1) For an LCD TV, how square does the colorimeter have to be to the TV screen? Since my TV is vertical, the sensor doesn't lie on the TV surface, and due to cord tension, it's not square with the TV either. I've been lightly pushing it against the screen to make it square and seal out ambient light (just touching it, not enough pressure to cause the screen to distort). Is this correct?
Yup! The Eye One has little suction cups and if you're very careful a little bit of pressure on the sensor will cause it to stick to the screen slightly. You want it to be completely flat against to avoid any extra light coming in. Not so much an issue at higher IREs but may cause problems at lower IREs if you're not in a dark room.
Or should I just let it dangle and try to get it as close to square with the screen as I can? (The measurements do change depending on if I just let it dangle or not.)
Nope. Make sure it's flat against the screen. I've updated the guide to make sure this is clear.
2) Why do you use only 100% color patterns? Shouldn't we try at least the 75% patterns as well? My TV seems to have some non-linearity with the color controls, since at 75% my luminance values are all too high, but at 100%, they're nearly perfect except for blue. Which one is more important to get right?
I'll let some of the experts answer this one but I would probably go with making 75% more correct if you can't get both 75% and 100% correct. (More content in that range).