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Couple questions about calibration..... - Page 2

post #31 of 46
If you are interested in a used i1Pro, there is one listed in the AVS Classified http://www.avsforum.com/t/1421960/x-rite-i1pro-eyeone-pro-spectroradiometer-rev-d
post #32 of 46
http://www.avsforum.com/t/1373556/i1-pro-or-d3-if-you-could-only-have-one-meter#post_21223525

This is a great thread about the i1pro.
post #33 of 46
Quote:
Originally Posted by Otto Pylot View Post

"Or is it better to just pay a professional $400 every 2 to 3 years (whatever the drift time is for a given set) knowing the quality of the instruments used (proper maintenance) and the experience of the calibrator?

It only took ~5 months for my LK450 to drift off D65 ... by quite an impressive margin (1st cal @ ~160hrs, 2nd cal @ ~2350hrs.) Based solely on my personal experience, I would say that for illuminant based displays (LCDs, DLPs and especially front projection) expecting a pro calibration to last even a full year would be wildly optimistic. Granted things *usually* calm down after the first year .... as for the LK450 in question, this is yet TBD.

For front projection, I would guess that the value of a periodic "pro" calibration would be nearly worthless ... but that's just a guess. wink.gif
post #34 of 46
Quote:
Originally Posted by PlasmaPZ80U View Post

This is a great thread about the i1pro.

Excellent callback.
post #35 of 46
Re. re-calibrating a projector... the lamp changes enough that you could calibrate after as little as 200 hours and have different settings... the question is... would that much difference be visible or not. There's a rather large variation on that. No easy way to answer. All you can say is that the lamp will drift enough in 200 hours that the best calibration settings will be different... you can't say for certain whether the drift would be enough to be visible. And it's REALLY difficult to say whether the drift after 500 or 1000 hours would become visible or not... it just depends... no way to be more definitive than that.
post #36 of 46
Quote:
Originally Posted by Doug Blackburn View Post

Re. re-calibrating a projector... the lamp changes enough that you could calibrate after as little as 200 hours and have different settings... the question is... would that much difference be visible or not. There's a rather large variation on that. No easy way to answer. All you can say is that the lamp will drift enough in 200 hours that the best calibration settings will be different... you can't say for certain whether the drift would be enough to be visible. And it's REALLY difficult to say whether the drift after 500 or 1000 hours would become visible or not... it just depends... no way to be more definitive than that.

...but would you agree that owning your own spectro and colorimeter could be more cost effective (long-term) in this scenario given the need to do touch-ups not less than every 6 months or so?

I guess I'm trying to say if money is no object you could have a pro regularly come over to keep your lamp based display device in calibration. However, this might not be affordable or practical for those who want to keep calibration costs down. In other words, some of us here appreciate a calibrated image as much as the next person, but have a more limited budget in this area and would rather spend more money on other things (perhaps including getting a better, higher-end display).

For example, let's say I have a TV budget of $1500. I could get a $1000 TV and spend the remaining $500 on calibration services (initial calibration and periodic touch-ups) or I could spend the whole $1500 on the TV and get a higher-end model with more PQ potential and just use existing calibration equipment I already have purchased a couple of years ago.
Edited by PlasmaPZ80U - 8/1/12 at 10:25am
post #37 of 46
Quote:
Originally Posted by Doug Blackburn View Post

Re. re-calibrating a projector... the lamp changes enough that you could calibrate after as little as 200 hours and have different settings... the question is... would that much difference be visible or not. There's a rather large variation on that. No easy way to answer. All you can say is that the lamp will drift enough in 200 hours that the best calibration settings will be different... you can't say for certain whether the drift would be enough to be visible. And it's REALLY difficult to say whether the drift after 500 or 1000 hours would become visible or not... it just depends... no way to be more definitive than that.

Agreed ... and I suspect the same principle applies to "low cost" meter drift. wink.gif

And ... I didn't mean that a pro calibration would be "worthless" for front projection per se, but rather that it probably isn't cost effective to pay somebody to come out to the crib and recalibrate every few 100hrs. Perhaps one could have a pro come in to get you started, then recheck/readjust things periodically with your own DIY equipment. I suppose it really depends on how quickly you rack up the hours.
post #38 of 46
Thread Starter 
Really didnt expect this to turn into a professional cal vs. alternative thread. My intention was to find out how close a Cal disk would get me to using somebody else's setting just for a reference point. Like I've said a proffessional Cal isn't possible in my situation so I am thinking of buying the Intermediate package package from SpectraCal. My reasoning behind this is so I can slowly get accustomed to the job, and possibly providing the service for the others here that can't get it professionally done.
post #39 of 46
Quote:
Originally Posted by nucl3arboNg View Post

Really didnt expect this to turn into a professional cal vs. alternative thread. My intention was to find out how close a Cal disk would get me to using somebody else's setting just for a reference point. Like I've said a proffessional Cal isn't possible in my situation so I am thinking of buying the Intermediate package package from SpectraCal. My reasoning behind this is so I can slowly get accustomed to the job, and possibly providing the service for the others here that can't get it professionally done.

Like Doug mentioned, using a setup disc alone will not result in anything remotely close to a calibration (with brightness and sharpness being the only things you can really optimize with it). To get results comparable to a pro calibration, you need meter(s), software, and plenty of hours spent learning and practicing the art/science that is calibration. smile.gif
post #40 of 46
Quote:
Originally Posted by nucl3arboNg View Post

Really didnt expect this to turn into a professional cal vs. alternative thread. My intention was to find out how close a Cal disk would get me to using somebody else's setting just for a reference point. Like I've said a proffessional Cal isn't possible in my situation so I am thinking of buying the Intermediate package package from SpectraCal. My reasoning behind this is so I can slowly get accustomed to the job, and possibly providing the service for the others here that can't get it professionally done.

Using a calibration disc to obtain Media Assisted Settings will most certainly help in both getting near optimum picture quality as well as learning what the TV settings do, why some "Advanced Settings" may not be a good choice to use, and gain an over all understanding of how to get the best picture quality for your viewing environment.

That said, there are TV owners less than satisfied with obtaining equipment calibrations and comparison to just using a disc. Much depends on the TV model and how good it may be out of the box. Your mileage may vary.
Edited by Phase700B - 8/1/12 at 5:39pm
post #41 of 46
Thread Starter 
Well I'm going to pickup my 65GT50 in about 20mins....let te experimentation begin biggrin.gif
post #42 of 46
Quote:
Originally Posted by nucl3arboNg View Post

Well I'm going to pickup my 65GT50 in about 20mins....let te experimentation begin biggrin.gif

Great! My suggestion. . . go to the GT50 thread to ask specific questions and forget about this one. You are probably more likely to get more practical input. smile.gif
post #43 of 46
Thread Starter 
I got it from a local electronics store here in northern Canada smile.gif
post #44 of 46
That's great. . . a local retailer is usually the best plus keeps money in the local economy. Here's hoping you have a very pleasing experience!

Here's the thread that may be of interest:

http://www.avsforum.com/t/1403635/official-panasonic-gt50-series-discussion-thread-no-street-price-talk
post #45 of 46
Quote:
Originally Posted by Phase700B View Post

getting near optimum picture quality

You and I have very different ideas of what near optimum quality is.
Quote:
Originally Posted by Phase700B View Post

That said, there are TV owners less than satisfied with obtaining equipment calibrations and comparison to just using a disc.

Just because you where unhappy with your results isn't representative of the majority of users. I know everyone is allowed their point of view, but the fact that you don't believe home calibration is even useful runs contrary to the purpose of this forum and borders on trolling.
post #46 of 46
Apologies if my comments were not in total agreement with yours. I am not sure what the silent majority thinks or believes. I was sharing my comments as others have and did include the statement below in an earlier post which is in harmony with display calibration. Equipment and software is always hopefully improving. I would like to think it will improve enough and still be affordable for a modest budget for me to try it again in the future.
Quote:
Originally Posted by Phase700B View Post


I would rather research and pay for a pro calibration from a reputable person. . . also providing I have a TV that is worth it and has the necessary controls (ie, not broken) to do it. It's a matter of degree then, as to the actual accuracy of picture quality desired and obtained.

Edited by Phase700B - 8/1/12 at 5:35pm
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