Some questions for Sony 5000 owners:
I dont have a huge screen-- 120" wide at 2.4 AR, with a throw of 18'. Ken W measured 123.5 nits. What is everyone using for their Display Max Light and DTM settings? I had been choosing 300 nits as display max light, but also note that Jim P and others using JVC, which should be less bright than the Sony, are setting Max Light at 400.
Jim stated "Set Max Light in the range of 5 to 6 times the measured white level in nits. You can extend this range to 4 to 8 times measured white if you prefer but we are finding 5 to 6 is optimal. Using five gives slightly more brightness and 6 gives slightly more color saturation." Given what was measured, these ranges would equate to ~ 500-1000 (4-8x), or, using the optimal range of 5-6x would result in ~600-750.
However, elsewhere I read: "you set the High-Set Max Light equal to about four times the measured projector maximum light output. To set this, leave the High-set Ratio = 0, and set the CMS1->HDR Mapping->Max Light to four times your measured maximum brightness. With High-set Ratio = 0 the reading on screen in CMS1->HDR Mapping, is the High-set "effective display max light" value".
These seem to be contradictory- in one place the Display Max light should be set from 4-8x measured, and optimally 5-6x measured, and then subsequently it says to make this value 4x measured.
So, in my case, measured at 123.5 nits, do I set display max light to 500 (more accurately 490)?
And, for the Sony users, what is the consensus on:
DLev (I understand Jim now suggests setting this to 8 in order to fully ignore Static MaxCLL)
Ratio This one still confuses me. I read Jim's suggestion to an earlier post "For the VW995 Max Light = 200 is likely too low unless you have a very large screen and/or low gain. For a dark movie it would work but for a bright movie like "The Meg" you will find colors are not going to look as good, especially for flesh tones. I think you need to raise Max Light and then raise Ratio so the low end effective Max Light is about 2X your light output in nits. With a higher Max Light and a ratio of 15 to 24, I believe you will get better performance across the wide range of movie brightness levels.
Set the Low-set Effective Max Light to two times the measured white level in nits. You can vary this a bit but stay close to 2x. This will mean Low-set Ratio is typically in the range of 15 to 28. The effective max light is now shown even in DTM mode when on the Ratio column. Sorry for a dumb question, but how/where does one see this? What are Sony users finding for this value? And, I should therefore target a ration where my max light at the selected ratio is ~ 247? Jim suggests 15-24, but said he thinks 24 is better now.
And, per above, high set ratio should be 0, right?
I can’t find the default values for these, and would rather not ‘reset to defaults’ globally because I have tweaked gamma and black levels. What are defaults for the following, and does anyone use settings other than default with good effect?
I like to use the MEM ABCD to quickly toggle between a few presets (eg Mem D might have gamma 1, black -1 to increase apparent contrast/improve apparent black levels). Am I correct that the setting I might want to play around with the most is Ratio? My recollection from Jim’s recent comments was that changing shape and transition would likely cause more harm than good.
Finally, I believe the default settings breaks low end at source max <2000 and high end at >2000. Does everyone leave this at default? If not, what value is used and how is it changed?
Sorry for so many questions but would love to wrap my head around all of this, short of trial and eror.