So what we have here is a digitized copy of a sheet of 4" x 5" Fujifilm Fujichrome Provia RPD III 100F color reversal film, that I exposed to the light with my home made 4" x 5" view camera built in my workshop all those years ago.
If you are not familiar with a view camera, it iis a large format camera, and in the case of my camera, it has a negative size of 4" by 5" allowing for very large photographs to be printed and displayed on your wall.
Think about the size of the negative or in this case a 4" x 5" transparency, and if you double the size you have an 8" x 10" photo, double it again, you have a 16" x 20" photo, double it again, you have 32" X 40" photo. grain....what grain, keep going bigger if you wish, makes no difference.
For the record, I had a Fujinon 90mm lens with a built in shutter mounted in place on the front standard to shoot this photograph.
When the camera is in use, the lens forms an inverted image on a ground glass screen directly at the plane of the film. The image viewed is exactly the same as the image on the film, which replaces the viewing screen during exposure.
My view camera has a flexible bellows that forms a light-tight seal between the two adjustable standards, one of which holds the lens, and the other the viewfinder (ground glass) or a photographic film holder.
The bellows is a flexible, accordion-pleated box made from a tough rubberized cloth material. It encloses the space between the lens and film, and flexes to accommodate the movements of the standards. The front standard has a board at the front of the camera that holds the lens and included shutter.
At the other end of the bellows, the rear standard is a frame that holds the ground glass plate, used for focusing and composing the image before exposure, and is replaced by a holder containing the light-sensitive film sheet.
The front and rear standards can move in various ways relative to each other, unlike most other camera types. This provides control over focus, depth of field, and perspective.
With the camera mounted on a tripod, and with a dark cloth placed over my head for composing the image as seen on the ground glass, and once composition has been completed , the aperture chosen, along with the shutter speed, a film holder with 1 sheet of film is put in place, and then the dark slides keeping the light from the sheet film are removed.
At that point its just a matter of activating the shutter exposing the film to the light for the required time, as everything about the camera is done manually as it should be in real photography!
Here is a look at the camera that shot this image.