Great Article about RAW photography: I know this web site is all about serious photographers. A friend sent me this link to an (in my estimation/opinion) article on the new iPhone PRO...

Paaflyer Loc: Kansas City, MO

I know this web site is all about serious photographers. A friend sent me this link to an (in my estimation/opinion) article on the new iPhone PRO RAW format. It covers way more than PRO RAW and goes into color photography in general. It is a very long detailed article. I think many of you might find it interesting. Please don't be too hard on me.

https://blog.halide.cam/understanding-proraw-4eed556d4c54

Ysarex Loc: St. Louis

Paaflyer wrote:

I know this web site is all about serious photographers. A friend sent me this link to an (in my estimation/opinion) article on the new iPhone PRO RAW format. It covers way more than PRO RAW and goes into color photography in general. It is a very long detailed article. I think many of you might find it interesting. Please don't be too hard on me.

https://blog.halide.cam/understanding-proraw-4eed556d4c54

You didn't write it so no need to be hard on you.

When the author talks about demosaicing a raw file and notes the inventor of the Bayer CFA found in most of our cameras he get's the inventor's name wrong which is a pretty bad mistake. The Kodak engineer was not Bruce Bayer his name was Bryce Bayer.

Otherwise the only other thing I would note is that Apple's new ProRAW format that is the subject of the article seems to be just an old linear DNG which has been around for a long time and which isn't raw.

Longshadow Loc: Audubon, PA, United States

Paaflyer wrote:

I know this web site is all about serious photographers. ...
...

Oh crap, I'm in the wrong place then!

Mark Sturtevant Loc: Grand Blanc, MI

That is a very readable article! It contains good general info on how camera sensors see color, etc. Basic info to some, but not to me (I did not know that sensors only really see black and white (!)), and I gotta learn these things one way or the other. And yes, the PRO RAW looks like a terrific feature. Thank you.

Paaflyer Loc: Kansas City, MO

Longshadow wrote:

Oh crap, I'm in the wrong place then!

HAVHA. laughing out loud.

Paaflyer Loc: Kansas City, MO

Yep. Black and white. First color photos was created by a photographer taking three black and white slides with color filters R G and B. Then projecting slides on a screen and overlapping the projections with color slides of R G and B. Voila color photo.

R.G. Loc: Scotland

Paaflyer wrote:

Yep. Black and white. First color photos was created by a photographer taking three black and white slides with color filters R G and B. Then projecting slides on a screen and overlapping the projections with color slides of R G and B. Voila color photo.

That's a fairly good description of how colour TV works.

Rongnongno Loc: FL

Mark Sturtevant wrote:

That is a very readable article! It contains good general info on how camera sensors see color, etc. Basic info to some, but not to me (I did not know that sensors only really see black and white (!)), and I gotta learn these things one way or the other. And yes, the PRO RAW looks like a terrific feature. Thank you.

Actually a sensor registers the green grey value in all RGB through a filter THEN add another G value.

So a sensor is really recording RGBG. This is why using a uniWB vs anything else is more accurate when shooting raw. The raw results are ugly green initially but once processed? This just at another level.

Bob posted this a long time ago...

Longshadow Loc: Audubon, PA, United States

Paaflyer wrote:

HAVHA. laughing out loud.

Seriously though,
serious is a step or two down from obsessed,
and a step or two above interested.

a6k Loc: Detroit & Sanibel

This is just a tech question for those who know more than I do. Back in the early 70's I built, for myself, a darkroom spot meter and had to select a sensor. At that time the available sensors had various levels of sensitivity to various colors. My point is that any sensor at that time had a color sensitivity curve. The curve was curved, not flat. Since I was printing black and white but with Kodak's variable contrast paper (it used color filters to vary the contrast) I had to take some care with that choice.

Does the sensor in a modern digital camera have this characteristic and if it does, are the filters in the array tuned for that? Would that account for some of why the various sensor makers produce slightly different results even in a raw file?

I enjoyed the article and learned a few things, too. Thanks for posting it Phil.

R.G. Loc: Scotland

a6k wrote:

.....Would that account for some of why the various sensor makers produce slightly different results even in a raw file?.....

The raw converters from the different software manufacturers are not all identical and don't produce identical results. That would account for some of the differences that you see. Another factor is the in-camera software that generates the raw file from the sensor data. For example the slightly magenta emphasis that Canon cameras display and the slightly yellow emphasis that Nikon cameras display are down to software differences, not sensor differences or filter differences.

Julian Loc: Sarasota, FL

Paaflyer wrote:

I know this web site is all about serious photographers. A friend sent me this link to an (in my estimation/opinion) article on the new iPhone PRO RAW format. It covers way more than PRO RAW and goes into color photography in general. It is a very long detailed article. I think many of you might find it interesting. Please don't be too hard on me.

https://blog.halide.cam/understanding-proraw-4eed556d4c54

Not your article! Have no fear.

Paaflyer Loc: Kansas City, MO

Rongnongno wrote:

Actually a sensor registers the green grey value in all RGB through a filter THEN add another G value.

So a sensor is really recording RGBG. This is why using a uniWB vs anything else is more accurate when shooting raw. The raw results are ugly green initially but once processed? This just at another level.

Bob posted this a long time ago...

Notice if you will that there are twice as many green filters in the Bayer filter than red and blue.