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Eye-One LT (2yrs old) vs. C6 NIST Spectracal - Page 2

post #31 of 35
Quote:
Originally Posted by gremmy View Post

I don't expect a $200 tool to be as accurate as a $700 tool.

But unless I am looking at those charts incorrectly (and maybe I am?), the eye 1 used for comparison here is so far off that I question whether it would have been worth calibrating with at all. I think I could have achieved error like that by eye!

In which case, I could have just spent my $200 on hookers and blow (not that I do either of those, but you get my point).

Exactly the reason I got rid of first my Spyder 3 and then my X-Rite D2. Placement on the screen caused "differences" too. While LCD or any screen may appear fairly uniform, placing the sensor in the center of the screen may not be representative of the average screen brightness for instance. Therefore. . . errors. Compound that with an "iffy" meter and what to do??

And, yes. . . After using the AVS HD709 and my "practiced eye" (from many years of CRT purity procedures and the like) I saw little difference in actual reference movie video quality comparing D2 calibrated settings to those obtained with a very careful use of the AVS HD709.

Bottom line. for me to be satisfied with my own cal equipment would set me back at least $1,000 but more like $3,500 for personal use. And this is just for consumer level TV. So, after my experience with under $1,000 meters comparing it to using the AVS HD709 disc, to insist that it would be so far off the mark as to not be a close representation of the original would be an overstatement. Especially on many of today's TVs.
post #32 of 35
Thread Starter 
I will re-post my test since it appears I have removed the repeatability errors, and I can appreciate the comments above, but I'm most interested in seeing actual testing like Chris (smack) is going to do, rather than us making presumptions about the accuracy of a NIST certified $700 meter.

Also, the eye-one LT I had was not totally useless, the gamma readings were pretty close and the luminance was exact between the two meters. Luminance accuracy on the primaries is more important than hue, and the hue was still ballpark on 4 of 6 of the colors. Hue accuracy is more important for secondaries (according to Spectracal docs).

So I cannot say I agree that having no meter is better than a cheap meter, I would suggest at least getting a $120 eye-one LT as a compromise. I can understand people not wanting to spend $700 on the C6 not knowing the real accuracy in a home theater room as opposed to a lab, but let's not jump to conclusions either. So gray-scale may have been off 5% to 15% on blue, but that isn't even the end of the world considering it got most of the other stuff right (plus I had a 2 year old eye-one LT, I doubt a new one is as inaccurate).

I don't even know if gray-scale was really off that much, I'm doing a more accurate test now with less variables in the equation, and I will re-post as stated.
post #33 of 35
Quote:
Originally Posted by coderguy View Post

I feel the same way now...
What was the verdict, was the c5 accurate?

The built in profiles were accurate on some displays and not so much on others. Presently I'm using a D3 that I profile from the i1Pro and feel comfortable with that setup.
post #34 of 35
Quote:
Originally Posted by buzzard767 View Post

The built in profiles were accurate on some displays and not so much on others. Presently I'm using a D3 that I profile from the i1Pro and feel comfortable with that setup.

This seems to agree with Michael Chen's test with the C6 versus the i1Pro and the Jeti on several LCD sets. It seemed to be an issue mostly with LED-LCDs, though I wonder if the same is true for CCFL-LCDs, since he one tested one of those (which wasn't that far off).
post #35 of 35
I did the calibration and all the readings tonight, but it's late, so I'll write it up tomorrow for everyone.
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