Warm Tungsten, Cool Windows: How Dana Fixed Her Studio Colour

The problem Dana brought to the session

Dana runs a small portrait studio with two cameras and a north-facing window. When she joined one of our sessions this autumn, her complaint was specific: portraits shot in the morning looked clean, but the same lighting setup after lunch pushed skin toward orange, and she spent evenings correcting files by hand.

She had tried auto white balance, then a preset labelled tungsten, then a number she had read somewhere and typed in from memory. None of these stayed consistent, because her light did not. Daylight from the window shifted through the day while two warm practical lamps stayed fixed.

Before touching a single setting, we asked her to describe the room at three times of day, where the lamps stood and how far the subject sat from the glass. That description turned out to matter more than any menu option.

Reading the room before reading the camera

Mixed light is the real subject here. Daylight and tungsten sit far apart in colour, and a camera can only settle on one compromise. Dana had been asking the camera to guess; we asked her to decide.

We walked the studio with a grey card and photographed it at the subject position under each light combination. Window only, lamps only, and both together gave three distinct frames, and the difference between them was obvious on her monitor without any measurement.

From that she saw something she had suspected but never confirmed: the lamps were contaminating the window light on the subject's shadow side. Moving them back by a metre and angling them away reduced the colour split more than any in-camera correction would have, and it cost nothing.

• Photograph the card at the subject position, not at the camera
• Test each light source alone, then combined
• Note the distance of every lamp from the subject

Setting a custom white balance, step by step

With the lamps repositioned, Dana set a custom white balance from the grey card. She filled the frame with the card, kept it evenly lit, and stored the reading as a named preset on each camera, so both bodies started from the same reference rather than two separate guesses.

We then shot a second frame of the card using that preset and checked it against the first. If the card read neutral on the screen and the values sat close together across the colour channels, the preset was good. If not, we repeated the reading with the card angled slightly differently, since glare on its surface is a common reason for a shifted result.

The whole routine took her under ten minutes in the room, and she wrote the steps on a card taped to the stand.

Checking skin tones, not just the grey

A neutral grey card does not guarantee pleasing skin. Dana's second task was a simple colour check on a real person: her assistant sat in position and we shot a frame under the final setup.

On screen the skin looked slightly green in the shadows. That pointed at a leftover tint from the window rather than from the lamps, and a small shift toward magenta on the preset corrected it. We stored that as a second named preset for window-heavy afternoons.

The lesson she took away was that a preset is a starting point you verify, not a setting you trust blindly. Checking one face at the start of each session catches drift that a grey card alone will miss, and it takes under a minute.

• Shoot one real face after the grey card
• Adjust tint separately from temperature
• Name presets by the light they were made for

What changed in her daily routine

The following week Dana reported that her afternoon files matched her morning ones closely enough that she stopped batch-correcting colour before delivery. Her routine now begins with the grey card, a named preset on each camera and one test portrait, and it ends the same way each day.

She also noted something we had not promised: working this way made her calmer about client sessions. Knowing the cameras agreed with each other meant she could watch the subject instead of the screen.

We did not change her equipment, and she did not buy new lights. The gain came from deciding on a colour reference, applying it to both cameras and writing the routine down so an assistant could repeat it when she was away.