untouched to me is a photo that's come straight from the camera (digital or film) onto paper. One that hasn't been manipulated in anyway on photoshop or other programs. Raw and unedited.
Dont get me wrong, I think those programs are wonderful and do amazing things for most photos, but I still think some of the best are completely untouched.
Nothing comes out of the camera untouched. be it film or digital.
In the case of film the first "manipulation" is the choice of film, it's grain, how it handles contrast and colours and all, i other words its characteristics. There are good reasons why there are so many different types of negative or positive film. There is different film for different purposes and different tastes.
Then there is the point how that film is processed, unless you let that be done in an automated lab there are many options to influence the outcome. And then the step from the negative film to the positive print, again, so many possibilities.
With the same camera, the same settings, the same light and same scene, but different types of film with varying processing parameters one can create a multitude of images which will all have their own mood and look pretty different.
You have to choose a film, and you have to process it, else you cannot see any image in the end. So you have to make all those decisions and there is no standard. So what is manipulation here? And what is a "straight out of the camera picture"?
So, now for digital ... a RAW file is not a really viewable file. Once you open it in any sort of RAW-coverter/viewer, a whole bunch of processing is done
before it is even displayed on the screen. I won't go into the de-mosaicing procedure, for which there are different algorithms, but speak about contrast and colours alone. And here the RAW file is not translated by means of linear curves, but by curves wich are supposed to represent the sensor's characterisics or just give images which look pleasing. A RAW file which would be translated into something viewable by a linear curve (which means simple linear translation of RGB signal values into digital image information/RGB values), would look very flat with almost no contrast. RAW converters offer you a choice of what characteristics/parameters to apply when displaying the image on screen and/or translating them into a TIFF or JPG. Some of these parameter sets might even mimic characteristics of certain types of film and their processing.
Again, as for film, there is no standard way, but a lot of parameters have to be chosen on the way. If you take the JPG straight out of the camera, the RAW conversion is done in-camera. This only means you rely on the camera's manufacturer idea of which parameters are best for you, just like you would rely on the automated lab to know how best to process your film. But again, this choice of parameters is totally arbitrary.
So what is a
non-manipulated straight-out-of-the-camera image? You could say, it is an illusion

It does not exist. If you do not change any parameters, that only means someone else has chosen them for you, but it does not mean they are not applied.
Sorry for this thread hijacking .. almost like ranting ... but I'm just on a mission today
Enjoy the Easter days everyone
