Garyminor Loc: Raleigh, NC

I'm looking for the thread in which there was an Excel spread sheet showing the values of different exposures for normal and ETTR images.

Can anyone remember this thread?

tramsey Loc: Texas

I was wondering the same thing. I'll just hang around and see what happens. Sorry

TriX Loc: Raleigh, NC

Just go to Selmslie's threads on ETTR (of which there are several), and you'll find it... Here's one at the end of the first thread, and there are more on the following threads: http://www.uglyhedgehog.com/t-430868-4.html

selmslie Loc: Fernandina Beach, FL, USA

Maybe you are looking for this: http://www.uglyhedgehog.com/t-431983-2.html#7265705

dpullum Loc: Tampa Florida

Which eventually leads to an excellent tech discussion:
http://digital-photography-school.com/exposing-to-the-right/

By the way... check out the free program
http://lightzoneproject.org/

selmslie Loc: Fernandina Beach, FL, USA

That article is woefully out of date and is based on very old cameras that were just beginning to use 12-bit raw files. Rather than repeat the entire discussion and demonstration you might want to review what I have already written on the subject:

1. What is the Camera's Dynamic Range? "There are two aspects of dynamic range: 1. The capacity of the sensor itself (100%) 2. The numeric capacity of the raw file (for 14 bits, a value up to 16,383)"
2. Is ETTR/EBTR a Concept Whose Time has Passed? "... there are still die-hard users of the technique who promote its use, in the absence of any remaining logical need for the convoluted process."
3. What is the Camera's Dynamic Range? - Part 2 " .... Their numbers and graphs are not as important as the visual evidence I am supplying."
4. What is a Scene's Dynamic Range (DR)? "You can't always trust what your camera's histogram tells you about the shadows and whether you can recover information from them."
5. ETTR-EBTR Challenge "What am I asking for here is for you to post any evidence of a scene where ETTR/EBTR can solve an exposure situation better than the simple caution expressed by, “Don’t blow the highlights.” "
6. ETTR/EBTR at Base ISO "What this shows is that for a scene with a normal dynamic range (DR) there is no benefit from using ETTR/EBTR at base ISO for my camera."
7. Shadow Recovery "Exposed at -2 EV from the camera's base matrix reading."
8. Don't Give Up on Dark Images "Since I was shooting close to base ISO the images could be rescued."
9. ETTR Claims May Be Misleading "... ETTR does not reduce the noise in an image. Noise is reduced by additional exposure. ... [the claim that] ETTR results in better tonal rendition. ... has never been demonstrated."

Scotty

Garyminor Loc: Raleigh, NC

Thanks, That is exactly what I am looking for.

Gary

catchlight.. Loc: Wisconsin USA- Halden Norway

This is one of the most contested questions on planet UHH...Scotty has done much research on this subject that will give you a good perspective.

rmalarz Loc: Tempe, Arizona

Someone else's data may not be relevant to yours. It may serve as a guide, but as they say, "your milage may vary".
--Bob

selmslie Loc: Fernandina Beach, FL, USA

That's why I have made it clear that the results I have posted come from my D610 and A7 II which happen to have very low noise and wide dynamic range (DR) at base ISO, as do the D800, D810 and several other current Nikon and Sony models.

It is also why I have carefully described how I produced my evidence. If you follow my procedures with your own camera you might find slightly different results. But I would be surprised to learn that any full frame modern DSLR or MILC would be significantly inferior to the cameras I used. Older camera or cameras with crop sensors might not perform quite as well.

Nevertheless, the principal findings of wider DR and less noise at lower ISO hold true for all cameras.

Nearly all modern cameras are vastly superior to the 12-bit cameras from 15 years ago that gave rise the development of ETTR as a work-around for their shortcomings.

catchlight.. Loc: Wisconsin USA- Halden Norway

Agreed and to the point.