CurtPalme.com Home Theater Forum

[Kendo]

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I am not convinced I am positioning the colorimeter correctly. According to (my interpretation of) Kal's clear instructions, it should point toward the screen in a way that, if the screen was a mirror, the Eye-One would point at the reflection of the projector. I imagine that if I had a high gain screen, which would have a hot-spot to point at, I would get the positioning results Kal suggests. But I have a screen with at most a 1.0 gain, so no hot-spot. When I follow the instructions, the highest FtL reading comes when the Eye-One points 90 degrees to the projector. The front face of the Eye-One is just still in shadow from the projector's light. This is about 70 degrees to the screen, since the Eye-One is near the lower left corner of the window. Is it "looking" at the entire 100 IRE window? Should I point it at the "mirror reflection" point in spite of the FtL readings?

~Ken

[Nashou66]

I just point it and move it till i get the highest reading i can and leave it there. Unless you make an extension arm for the probe to get a beter position to the angle of the reflected light, its not going to be perfect, but close is good enough.

Athanasios

[Kendo]

I experimented with how the I1 "looks" at what it is measuring by pointing it at the lit screen (100% Grey window) and moving a black cloth into its field of view to see where the mask started affecting the readings. It looks like the I1 has about a 70 degree field of view. So when I positioned it near the corner of the windowed test pattern and adjusted it for maximum FtL readings, that 70 degree field of view causes the I1 to "look" way off to the side as I described in the OP.

In other words, pilot error. And now I know a bit more about how the I1 works.

Nashou66's idea about an extension arm has me thinking, though.