Originally Posted by Libertarian
Well, my TV is in a bright sunny room, but it wasn't a problem because I had an extra bedsheet handy
Eliab brought a black tarp as well, and we basically pinned both of them up above the windows with some tiny tacks to block most of the sunlight. He told me the room doesn't need to be pitch black for the calibration anyway. So it wasn't a problem at all.
For those of you who go with Eliab, you won't regret it. Standard definition looks good...but once you see the high def picture after calibration, your jaw will literally hit the floor. His services are worth every penny.
I think I understand why ISF calibrators prefer a darkened room when they perform the calibration.
But if the TV is calibrated for a specific ambient lighting environment (darkened), how does the (calibrated) PQ (brightness/color, etc) "work" in the reverse environment, i.e. a well lighted, daytime environment? Does it appear "washed out". Is it "bright" enough? Does it have any "punch"? In particular is the IRIS set to a fixed opening (DB OFF, Closed, SB Gain 100-160) by the ISF calibrators?
In my "case study" the TV comes on about 11:00 AM and goes off around 11:30 PM (retired people). The setup/configuration needs to provide good PQ with no intervention on the part of the user aside from the P.Mode button on the remote. Note that the Gammas are both set to 0 (this SM adjustment works very well).
I have experimented with setting the IRIS to a fixed opening with SB Gain set from 100-160 in increments of 10. This was done in a daytime environment. Various picture modes were tried with various contrast/brightness, etc settings while alternating between SD and HD sources.
The results -- IMO -- the picture was, generally, too dark with the PQ on one source being OK while it appeared washed out on other sources. This was the case for SD versus HD AND for SD/HD show-time material versus SD/HD commercials. Within the SAME show the commercials would look fine while the actual TV show was horrible. The TV simply did not adjust to variances in the source very well. Add to that the change in ambient lighting from dawn to evening and any benefits achieved in a "perfect" calibration for a fixed environment are more than negated by the simple fact that the "perfect environment" is, in truth, a relatively small percentage of the actual viewing time.
For the time being, IMO, the Gammas=0 SM adjustment is a keeper. Its easy, simple and quite an improvement over OTB setup.
As for disabling the DB, there is a reason that Dynamic Black/Iris is advertised as a feature of the newer TVs. For the videophile, with a controlled home theater environment, seeking the perfect picture it may be undesirable. But for those limited to a single multi-purpose family room it may be a blessing.