Ysarex Loc: St. Louis

In other words you can't. All this time whining about UniWB and you have nothing to offer in it's place except what everyone has done all along and found to be inadequate. The best you can seriously offer is to chimp the camera JPEG. We did that and found it lacking. Admittedly few of us were super-human photographers able to smell sunny 16 with our eyes closed. So we looked for ways to improve our odds.

We found one. It's proven in practice regardless of how well you can chimp JPEGs, whine and plot meaningless graphs. I only need to turn on my camera and adjust the exposure until the highlight clipping warning activates and I don't have to chimp anything. I can make the call right then and there from that information and nail a raw file exposure. And not a sloppy one like your hedged and/or close enough exposures.

I have this function in three cameras now. It's useful.

I got along without it in the past. I got along with cameras that didn't have meters in the past. I got along without meters altogether in the past and I was good at it. But I recognize what works and improves my accuracy and results. And one things for sure; I no longer have to chimp.

selmslie Loc: Fernandina Beach, FL, USA

Go back to my previous post where I posted the real raw histograms along with the camera's histograms for Daylight WB and UniWB.

I guess you have been under the impression that when the UniWB promoters claim that with UniWB you will see the raw histograms they were telling the truth. As you can see, they were not being honest. But since you drank their Kool Aid you believed them.

You should have been more skeptical.

Ysarex Loc: St. Louis

Did I say I was using a histogram? I said: "UniWB in conjunction with my SL's highlight clipping warning tells me exactly when two channels in the raw file have reached highlight clipping." You can't do that and I can do it without chimping so I can make the exposure call immediately.

selmslie Loc: Fernandina Beach, FL, USA

If you don’t understand the plots I have posted I suggest that you test your assumptions with the help of RawDigger as I have.

selmslie Loc: Fernandina Beach, FL, USA

If you have Zebra warnings, this is a piece of cake.

Pick a neutral gray target and expose on manual to the point just before the Zebra warnings show up. Below is my test with the A7 II. It gives me about the same gap to the raw limit as I had with Daylight WB.

This shows is that the blinkies are actually based on the raw file, not the JPEG.

Your camera will have a different gap.

Just before the Zebra/blinkies show up 1/30s

(Download)

First exposure with blown raw highlights at 1/13s

(Download)

selmslie Loc: Fernandina Beach, FL, USA

The gap is also about the same with the Df at UniWB as it is with Daylight WB.

Now show us your results.

Last no blinkies 1/13s

(Download)

Highlights blown at 1/8s

(Download)

selmslie Loc: Fernandina Beach, FL, USA

I have been able to do that sine 2015 with the A7 II. When did you discover it?

Ysarex Loc: St. Louis

If you set the WB to UniWB. Otherwise you can't.

Ysarex Loc: St. Louis

I already did: https://www.uglyhedgehog.com/t-692202-4.html#12146668
And that test demonstrates the efficacy of using a UniWB setting on the camera as an exposure aid.

selmslie Loc: Fernandina Beach, FL, USA

I have used Zebras & blinkies in the Z7 with Daylight WB for 6 years.

Ysarex Loc: St. Louis

And that doesn't give you the same information you get if you set the WB to UniWB.

selmslie Loc: Fernandina Beach, FL, USA

Here is the same test with the Z7.

UniWB is the same as Daylight in the raw file.

Z7 last no blinkies

(Download)

Z7 blown highlights

(Download)

Z7 last no blinkies Daylight WB

(Download)

selmslie Loc: Fernandina Beach, FL, USA

Yes it does as I just proved in my last post.

What have I shown you so far:

1. WB does not change the raw file (you should have already known this).
2. WB does not affect the meter reading. That's because it's looking at pending raw data, not the JPEG.
3. WB does not affect the highlight warnings.
4. You put too much faith in the stuff you read on the internet. You are gullible. You need to do your own testing.

The bottom line is that UniWB doesn't provide any benefits at all. It's all smoke and mirrors - snake oil.

Gene51 Loc: Yonkers, NY, now in LSD (LowerSlowerDelaware)

Let it go, Scotty, you made your point 6 yrs ago when you posted this thread:

https://www.uglyhedgehog.com/t-329486-1.html

You aren't going to convince anyone to do anything differently one way or the other.

Give it a rest. Let the horse die in peace, again.

selmslie Loc: Fernandina Beach, FL, USA

It bears repeating because some in the audience are slow to catch on.

But you are right. I have proven my point once more. The only difference is that I have newer and better evidence from multiple cameras.

And one extremely dense and antagonistic student.