Ya know CRI is all fine and good butt to be quite honestly frank I find it ridiculously tedious.
Soooo……last nite as I’m watering plants I whip out my new Ti3 and Trustfire Mini2. The Ti3 being recently de-domed gave much better TCR to my eyes than the stock NW. The Mini2 being de-domed already not so much.
Point being of this mini-rant is that I’m devising my own CRI standard from now on.
I will ‘calibrate’ a flash by shining it on one of my favorite paintings. I know its true colors like the back of my wife’s hand.
On a scale of 1 to 10 with 10 being the most accurate TCR if a flash renditions the painting colors as I know they should be then it gets of course a higher rating.
The plants last nite with the de-domed Ti3 got an 8.5 TCR. That’s pretty dam good cuz the Mini2 got a 5.
There ya have it. Another useless to many Notta Rant butt a rant’s a rant.
Oh yeah I like it don’t get me wrong. I doooo REALLY like that Mini spill!!! Outfookingstanding.
Wear it now with a leather strap ’round my neck. So handy. Sheeiiiit, just got the Mini2 couple days ago butt I was hoping to de-dome it too. :laughing:
Ok on second thot I’ll give it a 6.0 TCR. Maybe 6.5 if I pretend I de-domed it. :laughing: :+1:
PS. Gotta find a way to warm it up some. Any ideas? :student:
No, unfortunately the PCB is quite special. Difficult to replace. I asked the manufacturer for warm hcri LEDs (they exist according to their product page) but they have not answered.
I mean CRI is kind of a crappy standard, it compares colors to a black body radiator. So I can have a 99.9999172818247929 CRI light, but if it is 2000K then everything is an ugly yellow and greens and blues look like crap.
That doesn’t make it a crappy standard. Light spectra are more complex than a single factor can describe. You need to select for multiple factors to define the light desired for a given situation. By convention, we call out not only CRI, but also chromaticity in terms of both color temperature and deviation from the black body locus in terms of DUV.
Btw one doesn’t “need” to do sheeiiitttt. Not harpin’ ya personally. Just that this techno- blab stuff has been gettin’ carried away regarding CRI vs the real world of uses vs personal tint tastes. All where the ultimate aim from a personal perspective is, …….
“Do I see the three primary colors and its range of complimentaries in a fashion well enuff that I am pleased with watt I’m illuminating back to my very unique eyes”. :laughing:
How ya “gauge” that from a human uniqueness perspective shouldn’t “need” to be made over-complex.
You’re discounting how relative human vision is. Shining the same light, at the same object(s) can look completely different for me based on time of day/ambient lighting. TM-30 was created to address the many serious downsides of the older “CRI” rating:
Long video, but if anyone’s bored it’s an amazing source of info.
What I’m trying to express is that based on time of day, actual lux level of that sunlight vs the flashlight, etc. you will never be able to judge that based on your own vision alone. That’s why we have objective measurements of color rendition, CCT, etc.
Set a fixed color balance on your camera, take pics at 6am, 12pm, 5pm and 8pm and compare them. The very same light has looked angry blue in some situations, neutral temp but green in others, and VERY warm and rosy at dusk on a partly cloudy day to me.
The way we perceive color temp is VERY dependent on lux, this is explained in the Kruithof Curve.
However I was also going to add another facet to TCR. Our eyes being uniquely different can fine-tune TCR through numbers. By that I mean for instance if my wife views the same Picasso in sunlight and then later illuminates it with the given flash do her and me come up with a pretty close TCR? Then I add my kids. Then my neighbor.
If all of us get a consensus that the particular flash’s TCR is between 8.2 and 9.3 then average them for a TCR of let’s say 8.7 then I could comfortably say that that’s a reasonably accurate TCR.
So if someone should ask me, “Yeah Notta, you’re touting this flash butt watt’s the TCR?”
I could confidently say the TCR for me is 8.5. Consensus average with others was 8.7. That should give someone else a reasonably accurate idea of how the flash performed within those parameters.
If ya add tint to all that, well IMO because that tends to be a very personal choice, then consequently TCR purposely avoids addressing it.
PS. Nothing of course stops you from comparing the LED manufacturer’s CRI for that particular bin, etc., to TCR. I would probably just tell you to be honest that I considered the TCR for me to be 8.5 and leave it at that. Butt I also personally felt that the tint was a bit over-yellowed for my tastes and consequently you might wanna keep that in mind, or not. Ya might prefer yellow tints who knows.
I think most here becuz of their experience know when a flash TCR is ridiculous. A red apple in typical sunlight when flashed looks like a rotten decomposing eggplant.
TCR? “1.0 Mr. Blutarsky.”
PSS. I just used decimal points butt let’s get real. Who’s gonna accurately differentiate between a .5 and .7? I could go for .5 increments though to have some flex. Could some flash get a 10? Possible I guess.
PSSS. Ya know I always liked giving 99.99% sure when someone really tries to pin me down on a crucial answer. Then if I’m somehow completely off the carrot truck I can always go back, “Yeah butt I did say only 99.99% sure.”
