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Color accuracy: S vs. I


Deliberate1

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Yesterday, a mate and I traveled to an island off the Maine coast for a day of shooting - me with my S kit and him with a Nikon bag and his iPhone. We ended up in a splendid mid 19th century Congressional church high on a hill which was irresistible. So I mounted the 35mm on to the body, and the rig onto the Gitzo/RRS tripod. The perspective of the shots I set up involved a series of strong right angles created by door frames, walls and other elements. After no small effort, given the absence of LF movements available with my Toyo 4x5, I finally got the camera as aligned as possible to avoid as much lineal distortion as possible. Though my success could only be approximated by chimping.

The interior also involved a wide tonal range, from zone 2 to zone 8, more or less, from transcendent stained glass light to shadows cast by neatly configured pews.

As I was going through the alchemy of exposure and orientation adjustments, my pal was happily clicking away with his phone. When we were done results were compared. And I confess a certain level of disbelief and envy.

First of all, while his effective 28mm lens showed some expected distortion, he brought up an app that allowed him to correct it, on the screen, with the touch of a finger. Mine will require time in LR/PS with what I would say are less sophisticated tools since he could do targeted adjustments to parts of an image.

Equally surprising was the color fidelity that came from that little device. A stained glass window had panels of yellow and light green that were similar in hue. The S failed to capture the not so subtle distinction, but the I phone nailed it. Perhaps because the phone put the images through a jpg process and I was shooting in RAW.

I was in no way humbled by the capability of this phone device. More impressed than anything. He had the right tool for his purposes - images that will live, mostly as shot, on a computer, while the best of mine will live on a wall. But I could not help but be impressed by the technical sophistication of the phone, and it got me to thinking how extraordinary the S could be if the same R&D dollars were aimed at it. But I suspect there are just a few more customers world wide for cell phones than our Leica boxes. Fortunately for me, I enjoy sitting in front of a computer bringing RAW images to life. That said, I have a Q, and could very much put that in camera distortion correction to good use.

Time to make my wife a "Photoshop widow" for the morning.

Cheers

David

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One of the strengths of the iPhone is that it is a wide gamut display. If you have a desktop with 10-bit color and wide gamut, you will find where the S is able to capture those subtle hues too. But a standard screen will mask the differences that the iPhone display can show.

 

The other strength is the raw processor in the iPhone. Apple, Samsung and Huawei have spent considerable effort in their processing. Dedicated camera manufacturers should follow Fujifilm (and of all companies, Samsung) cooking their JPEG output. We have RAW for dedicated editing but Fuji’s RAW allows you pull back the highlights and boost the shadows, which is what 75% of Lightroom editing involves...

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Very interesting. Thanks for  the explanation. I have been running a calibrated NEC monitor for several years. And when I put the island images up today, I saw all the colors that I remember. So I learned that the S screen does not accurately reflect the fiull gamut of colors captured by the sensor, unlike the Iphone screen. No criticism meant. Not a fair fight comparing state of the state of the art phone screen with five plus year old tech. Always good to learn the limitations of the camera - to avoid disappointment or unreasonable expectations.

David

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Try put a S file in TIFF form on an iPhone in 16 bits... then you'll see it in great colour too...

 

Or buy a wide gamut display...

 

The viewing of your images is only as good as the screen you're watching it on.

 

The iPhone X wide gamut HDR display is amazingly good, and much better than many people have on their desktops at home for photo editing.

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David the S LCD (or any camera?) cannot possibly display the same gamut or resolution or contrast etc as a modern smartphone which is intended as a display device for the processed images (that also makes phone calls ). It’s not intended to of course. It is an information display that can show a low resolution PREVIEW based on a default jpg rendering too even when you are capturing in the DNG raw format. Imagine carrying your S around to show photos to your friends or holding it at arms length for selfies!

Edited by hoppyman
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OP again. Last weekend, my pal with the I phone (see original post) came over with some images from Myanmar for me to print. I brought them up on my NEC monitor and did some minor adjustments and then printed. Frankly, the color fidelity and tonal gradation for the monochrome images processed inside the phone was remarkable. There is a portrait function, in the app, that isolates the main subject with a background gradually blacked out in a very elegant way. It takes me a fair amount of work in Photoshop to that effect, when it works. And the images, which I printed to 11x14 on my Epson 7800, were lovely, especially the monochrome ones. I would not give up a "proper" camera for the phone. But I think the definition of what a "proper" camera is is something that we all may have to come to grips with. This same pal has invested thousands in Nikon glass and bodies. And the images he asked me to print for this competition were all from the device in his back pocket, 

Edited by Deliberate1
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