My friend who owns a bunch of guitars loans them to me so I can photograph them. This one is his Martin acoustic guitar, which he plays while his wife cooks dinner. That's because, of all his guitars, this one has her favorite sound.
The biggest difficulty by far, especially in the constraints of my tiny makeshift studio, is to light all the strings so their entire length appears bright. I had a really tough time doing that with Photo #4, so much so that I photographed it three times before I was finally satisfied. When making Photo #1, it was physically impossible to make that happen with one capture, so I merged two shots. Even so, when viewing that photo here in the thread, the upper area of the far right string disappears. That's not because it's not bright (it's very bright in the full-size file). That's because at the small magnification displayed here, it's just not possible to see that part of the tiny string.
Note: The moire that appears in the first photo is not in the full-size image file.
Photo #1 Setup
The background and tabletop are a single sheet of black velvet. First capture: Two medium continuous-light lamps in the top left area light everything except the tuning knobs on the right side and the strings where they cross the sound hole. A small continuous-light lamp on the right, which is flagged to prevent light from falling on the guitar below the head stock, lights the tuning knobs not lit by the medium lamps. Second capture: One medium continuous-light lamp on the left side of the body lights the strings where they cross the sound hole. The sound hole and the strings crossing it were merged with the first capture.
Photo #2 Setup
The background is light brown art paper. A small continuous-light lamp on the right side lights the subject and adds a highlight on the right edge of the head stock. Another one, which is flagged to prevent too much light from falling on the background, lights the background and adds the highlight on the left edge of the head stock. A reflector in the right front area below the subject lights the two far right strings. A reflector handheld above the subject and camera tilted at about a 45-degree angle to the floor lights the tuning pegs.
Photo #3 Setup
The foreground tabletop is rumpled black velvet and the rear tabletop is black presentation paper. A medium continuous-light lamp lights the top side of the guitar and the tabletop. A small continuous-light lamp lights the side of the guitar and the neck. A flashlight lights the area where where the neck joins the side of the guitar.
Photo #4 Setup
The background is black presentation paper and the tabletop is black velvet. Two small continuous-light lamps, one above the other, are at the rear and above the subject to ensure that all the strings are brightly lit throughout their length. The bottom lamp is flagged to prevent too much light from falling on the background. A medium continuous-light lamp in the right, lower area brightens the side of the guitar and creates a reflection on the right end of the bridge to help define its shape. A reflector behind the bridge brightens the near side of the string pegs and the saddle.
Photo #5 Setup
A medium continuous-light lamp is on the left side. Black presentation paper with a hole cut in it hangs on the lens to prevent the tripod and camera from being reflected in the shiny pick guard.
Photo #1
Photo #2
Photo #3
Photo #4
Photo #5