Stage Dance Stills

The house lights go down and the hall turns quiet enough to hear a programme rustle three rows back. A soloist walks into a narrow pool of warm light at centre stage, and the backdrop behind her glows deep blue. You are in row twelve, about 15 m from her, with the Tamron 70-180mm f/2.8 Di III VC VXD G2 at 180 mm and the Z6III to your eye.

Almost every default on the camera is wrong for this moment. The mechanical shutter clacks into the silence. The meter sees a frame that is mostly black and brightens the picture until her white dress loses its folds. The LED fixtures overhead pulse faster than the eye can follow, and the electronic shutter you switch to for silence can print that pulse as stripes across her. Auto white balance tries to turn the blue backdrop grey. And there is so little light that the ISO climbs into the tens of thousands.

Each of those problems has a setting that answers it, and earlier chapters already settled nearly all of them. What follows takes them in the order they bite, then gathers the answers into one card and one button map.

Page numbers in parentheses point to Nikon's Z6III Reference Guide, edition 09, which matches firmware 2.00.

01.Silence First

In a quiet passage of music, a mechanical shutter is the loudest thing in the room. Setting d6 Shutter type to Electronic shutter removes the moving curtain (pp. 668, 846), as Shutter Types explains, but the camera then plays an artificial shutter sound unless Shutter sound under Camera sounds is OFF (p. 844). Silent mode in the setup menu does the whole job in one step. It forces the electronic shutter whatever d6 says, mutes the shutter sound and the beep, and stops an attached flash from firing (pp. 845-846).

Silent mode makes the camera quieter, not silent. Nikon says you may still hear focusing and the aperture moving, the aperture most of all at f-numbers above f/5.6 (p. 846). That is one more reason to keep the Tamron at f/2.8, where the dim stage wants it anyway. The camera also sounds when the standby timer starts or runs out, Silent mode or not, unless c3 Power off delay > Standby timer is set to No limit (p. 846). A display that never times out costs battery (p. 661), so a spare EN-EL15c goes in a pocket. Silent Shooting, Timers and Time-Lapse recommends both settings for a theatre, with Silent mode on a button and d6 left at Auto (p. 668), as Shutter Types does, so the mechanical shutter is one press away at a rehearsal where sound does not matter.

Speed is not what silence costs. In Continuous H the electronic shutter, Silent mode included, reaches about 15.3 frames per second for raw files against about 8.1 with the mechanical shutter (p. 154), though Nikon warns the rate may drop at times (p. 846). The real costs are the ones the next sections deal with: stripes under some lights, and fast motion that bends (p. 846), because the sensor is read out row by row, as Shutter Types explains. Release Modes, Frame Rates and the Buffer prefers the mechanical shutter or the electronic front-curtain shutter (EFCS) on stage, chiefly because Photo flicker reduction works with them (pp. 483-484), and turns to the electronic one only when the venue demands silence. From a seat in the audience during a performance, it does.

None of this is permission to shoot. The theatre's rules on photography come first, and Nikon's own note on Silent mode makes the point that a quiet camera changes nothing about the respect owed to the people in front of it (p. 846).

02.Bands Under Stage Light

The first test frame looks fine on the screen. Zoomed in, faint horizontal stripes run across the dancer's dress, a little brighter, a little darker, evenly spaced. The camera is working correctly. The light is flickering.

Flicker is a rapid, regular rise and fall in a lamp's brightness. Nikon names fluorescent, mercury-vapour and sodium lamps (p. 846) and high-frequency LED lighting (p. 485) as sources. Your eye averages it away, and so does any exposure that holds whole cycles of it. The electronic shutter breaks that averaging. Each row of the sensor starts and ends its exposure a little later than the row above, across a readout that external measurements put near 14.5 ms, so each row samples the light at a different point in its cycle and records a different brightness. Shutter Types derives the size of the effect and draws it.

Two Nikon features fight flicker, and only one of them survives Silent mode. Photo flicker reduction detects flicker at 100 and 120 Hz, the rates mains-powered lamps produce (p. 483), but it takes no effect in Silent mode or with the electronic shutter (p. 484). It can also delay the shutter response slightly (p. 483), so the recipe leaves it OFF, as Shutter Types advises.

High-frequency flicker reduction is the tool left standing. Set to On (shutter speed fine-tuning), it lets you move the shutter speed in steps finer than the usual scale in modes S and M, from 1/8000 s to 1/30 s with the electronic shutter, while you watch the preview for the speed at which the stripes fade (p. 485). Zooming the display in on the dancer makes the stripes easier to judge, and test frames have the final word, because the preview and the photograph can differ (pp. 485-486).

Why should a small change of speed matter? Stripes cancel when every row's exposure holds a whole number of the light's pulses, because then each row collects the same total light wherever in the cycle it starts. Write $f$ for the fixture's pulse rate in pulses per second and $T$ for the exposure time in seconds. The condition is that the product $fT$ is a whole number. Suppose, for illustration, that the stage LEDs pulse 2,000 times a second. The speed the camera labels 1/500 s is in fact 1/512 s (p. 485), so

$$fT = 2000 \times \frac{1}{512} \approx 3.906.$$

Each row catches three whole pulses plus 0.906 of a fourth, and where that leftover fraction falls in the cycle shifts from row to row. At exactly 1/500 s,

$$fT = 2000 \times \frac{1}{500} = 4,$$

a whole number, and the stripes vanish. The ordinary scale cannot give you 1/500.0 s, and fine-tuning is how you walk the speed toward it while watching the stripes. In a real theatre you will not know the fixture's rate, which is why the method is to watch rather than to calculate.

Do the hunt at the technical rehearsal, under the cues you will shoot, since each cue may use different fixtures. Then leave fine-tuning on: turning it off sends the speed back to the nearest ordinary value (p. 485), and the band-free speed you found would be lost.

03.Framing and Freezing From Row Twelve

How much of the stage does 180 mm show from 15 m, and how fast must the shutter be? Both answers start from one number.

Magnification is the size of the subject's image on the sensor divided by its real size. For a lens of focal length $f$ focused at a distance $s$, both in millimetres, a simple lens model gives

$$m = \frac{f}{s - f} = \frac{180}{15000 - 180} = \frac{180}{14820} \approx 0.01215.$$

Held tall, the sensor's 36 mm long side runs vertically, so the frame covers $36/m \approx 2{,}964$ mm of height at the dancer, about 2.96 m, and its 24 mm side covers about 1.98 m across. A dancer 1.7 m tall fills about 57% of that height, which leaves room above her for a leap. At 70 mm the same seat frames about 7.68 m by 5.12 m, enough for a group. Shooting tall is why Viewfinder and Monitor Displays keeps Auto rotate info display on for stage, and Image Area and Crop stays in FX, since a DX crop can clip a raised arm.

Now the shutter. While it is open, a moving dancer's image slides across the sensor. If she moves at speed $v$ in millimetres per second and the exposure lasts $t$ seconds, her image moves $b = m\,v\,t$ millimetres. Call the picture sharp when $b$ is no larger than the circle of confusion $c$, the largest blur spot that still looks like a point in a print viewed at a normal distance. This guide takes $c = 0.03$ mm for the full-frame sensor. The longest acceptable exposure is then

$$t_{\max} = \frac{c}{m\,v}.$$

Take, for illustration, an arm sweeping at 1 m/s, which is 1,000 mm/s. On the sensor that becomes $m\,v \approx 0.01215 \times 1000 = 12.15$ mm/s, and

$$t_{\max} \approx \frac{0.03}{12.15} \approx 0.00247 \text{ s} \approx \frac{1}{405} \text{ s}.$$

A body travelling at 2 m/s through a leap doubles the image speed to about 24.3 mm/s and halves the limit to about 1/810 s. That arithmetic supports the judgement in ISO and Auto ISO of 1/500 s for most dance and 1/1000 s for leaps. Both speeds of motion are illustrative, and a hand at the end of a fast turn can move faster, so check the frames magnified.

Stabilisation does not help with any of this. It steadies your hands, not the dancer. Vibration Reduction still picks Sport for the Tamron if the menu offers it with that lens, since Nikon describes Sport for subjects that move fast and without pattern, and the options vary with the lens (p. 498).

A leap also shows the electronic shutter's second cost. Because rows are read one after another, as Shutter Types, Rolling Shutter and Flicker explains, a fast limb can lean or bend (p. 846) in the frame. What a Partially Stacked Sensor Changes explains why this sensor bends it far less than the Z6II's did, and the recipe accepts what remains as the price of silence.

04.Depth of Field and Focus

Focus is less forgiving than the long distance suggests. Depth of field is the span of distances in front of and behind the focus point that still looks sharp, judged with the same $c$. For an f-number $N$, and the same $f$ and $s$, a good approximation when the subject is far closer than the hyperfocal distance is

$$D \approx \frac{2 N c s^2}{f^2} = \frac{2 \times 2.8 \times 0.03 \times 15000^2}{180^2} = \frac{37{,}800{,}000}{32{,}400} \approx 1{,}167 \text{ mm}.$$

The hyperfocal distance $H$ is the nearest focus distance at which everything out to infinity looks sharp, and here $H = f^2/(Nc) + f \approx 385.9$ m, far beyond the stage. The exact limits use it:

$$s_{\text{near}} = \frac{s\,(H - f)}{H + s - 2f} \approx 14.44 \text{ m}, \qquad s_{\text{far}} = \frac{s\,(H - f)}{H - s} \approx 15.60 \text{ m}.$$

The sharp zone is about 1.15 m deep, close to the approximation, and Figure 1 draws it to scale.

One stride upstage takes a dancer out of that zone, so focus has to follow her, and that is the job of Continuous AF. Choosing an Autofocus Setup builds the stage setup, and the recipe takes it whole. Wide-area AF (C1) is shaped as a tall box about the size of one dancer in the frame, sized anywhere from 1x1 to 21x13 focus points in FX (p. 125), with People detection working inside it to find her face and eyes (pp. 127-128). The setup avoids 3D-tracking, because Nikon warns it can lose a subject whose colour or brightness changes visibly (p. 126), and that describes every lighting cue.

Three custom settings finish it. a3 Blocked shot AF response at 4 holds focus on your dancer when another crosses in front (p. 633). a1 AF-C priority selection at Focus + release makes the first frame of each burst wait for focus when the subject is dark or low in contrast, then lets the rest of the burst fire freely (p. 631). a6 AF activation stays at Shutter/AF-ON, so a half-press focuses (p. 637), as Back-Button Focus recommends for stage. The built-in AF-assist illuminator goes OFF. It lights only for Single AF and reaches about 1 to 3 m (p. 643), so it cannot help from row twelve, and a lamp has no place in a dark auditorium anyway.

Tone mode stays at SDR. Nikon says subject detection can perform worse with HLG (p. 130), and HLG pictures carry more noise (p. 462). A focus limiter with its far limit set just beyond the back wall would stop the lens hunting into the dark. The Tamron is a Z mount lens, as the limiter requires (p. 648), but Nikon names no third-party lenses, so this recipe does not rely on it until a rehearsal shows it holds.

05.Metering a Spotlit Dancer

Point an ordinary averaging meter at the opening scene and it sees mostly black. A reflected-light meter tries to make whatever it reads come out middle grey, so it brightens the frame until the black stage turns grey, and the dancer in her pool of light goes white with no folds left in the dress. Metering works through why.

Highlight-weighted metering is Nikon's answer, and its own example is performers lit by a spotlight (p. 487). It gives the brightest parts of the frame the most say, so it protects the lit dancer and lets the stage fall dark, which is what a stage looks like.

The meter's answer then goes to Auto ISO, because the mode is M. In M you set the shutter speed and aperture yourself, 1/500 s and f/2.8 here, and with Auto ISO sensitivity control on, the camera adjusts ISO to give the right exposure at them (p. 145). That is the split Exposure Modes recommends for stage: you hold the two settings that guard against blur and soft focus, and only noise is left to the camera.

Exposure compensation still works in this arrangement. In M with Auto ISO it moves the ISO, and so the exposure (p. 152). ISO and Auto ISO uses about $-0.7$ EV with Matrix metering, because a meter that sees black stage lifts everything and clips skin and white costumes, and 0.0 with Highlight-weighted. Highlight-weighted metering already refuses most of that lift (p. 487), so I start at 0.0 and dial in the $-0.7$ EV only when the highlights blink on a face. Whatever you set survives switching the camera off (p. 152), so return it to zero after the show.

Check exposure by the evidence, not by how bright the picture looks in a dark hall. In playback, any part of the frame that may have lost its highlight detail blinks, and the histogram graphs how many pixels sit at each tone from dark to bright (pp. 225, 227). With the monitor mode at Viewfinder only, the rear screen stays blank and playback appears in the viewfinder (p. 66), so you can check without lighting up the row behind you. Starlight view (photo Lv) brightens the shooting display in near darkness but hides the live histogram (p. 675), so switch it off when the lights come up.

06.Noise at Stage ISOs

Suppose a cue settles Auto ISO at ISO 6400 for 1/500 s at f/2.8. For a leap you turn to 1/1000 s. Half the light now reaches the sensor, and Auto ISO doubles to ISO 12800 to keep the picture as bright. The next cue is a stop dimmer, and it goes to ISO 25600. The numbers are illustrative, but the steps are not: each halving of the light doubles the ISO.

What doubling the ISO costs is noise, and the reason is counting. Light arrives as photons, and the number a pixel collects in a given exposure varies at random. If a pixel expects $N$ photons, the typical size of that random variation is $\sqrt{N}$, so the signal-to-noise ratio, the signal divided by the variation, is

$$\text{SNR} = \frac{N}{\sqrt{N}} = \sqrt{N}.$$

Say a mid-tone pixel on her face collects $N = 1600$ photons at 1/500 s, so its SNR is $\sqrt{1600} = 40$. At 1/1000 s it collects 800, and the SNR falls to $\sqrt{800} \approx 28.3$. In the dimmer cue it collects 400, and the SNR is $\sqrt{400} = 20$. Each stop of light lost divides the SNR by $\sqrt{2} \approx 1.41$, whatever the ISO reads. ISO only sets how brightly the camera renders what was caught, and ISO and Auto ISO draws this with a figure.

That is why the recipe sets Maximum sensitivity to 25600, as ISO and Auto ISO does. In M that ceiling is a brightness limit rather than a noise control: when the light falls below what ISO 25600 can cover at 1/500 s and f/2.8, the picture comes out darker instead. I would rather have a dark raw file than a blurred one, because a dark file can be brightened and a blurred one cannot be repaired.

High ISO NR, which processes pictures to reduce the randomly scattered bright pixels of noise (p. 476), stays at Normal, the setting ISO and Auto ISO keeps for everything except feathers. The files are raw, at High efficiency★ as RAW, JPEG, HEIF and Tone Mode chooses for stage, so noise reduction and white balance can be done carefully afterwards. Set Picture Control at Neutral and Active D-Lighting at Off follow Picture Controls and Colour: stage light is already strongly coloured, and a dark stage should stay dark.

07.Coloured Light and White Balance

Stage light is coloured on purpose. A designer might wash the backdrop deep blue, put magenta side light on the dancers and a warmer front light on their faces. Auto white balance sees that mix, tries to pull it toward neutral, and can guess differently from one cue to the next. On a stage the faces are what you get right, and the coloured washes are what you keep.

So the recipe uses Preset manual, as White Balance does for stage. At a rehearsal, put a white or grey object in the front light where the dancer will stand and measure it (p. 177). The camera keeps up to six measured values, d-1 to d-6, and measuring starts from the Fn1 button, which carries white balance by default (pp. 176-177, 625). Protect the preset afterwards so a stray press cannot overwrite it, and give it a comment that names the venue (p. 178).

With no rehearsal to measure at, take one frame on Auto in the plain white front light, read the colour temperature on the Basic shooting data page in playback (p. 167), and set that number with Choose color temperature, which spans about 2500 to 10,000 K (p. 165). Either way the files are raw, so the balance can still be changed later without loss.

08.The Recipe

The card puts every setting from this chapter in one place, each with its reason in a line. Set it at home in mode M, check it at the technical rehearsal, and leave it alone during the show.

Field recipe · Stage dance

Stage Dance Stills with the Tamron 70-180mm

Exposure

Setting	Set it to	Why
Mode dial	M	You hold speed and aperture, Auto ISO follows the light
Shutter speed	1/500 s, 1/1000 s for leaps	Freezes an arm at 15 m, a leap needs twice the speed
Aperture	f/2.8	The most light, and the aperture stays quiet
Auto ISO sensitivity controlPhoto shooting menu > ISO sensitivity settings > Auto ISO sensitivity control	ON	ISO tracks each lighting cue in mode M
Maximum sensitivityPhoto shooting menu > ISO sensitivity settings > Maximum sensitivity	25600	A dark raw file beats a blurred one
MeteringPhoto shooting menu > Metering	Highlight-weighted metering	Protects the spotlit dancer and lets the stage stay black
Exposure compensation	0.0, or −0.7 EV if skin clips	Only when highlights blink on a face, reset after the show

Silence and Flicker

Setting	Set it to	Why
Silent modeSetup menu > Silent mode	ON	Electronic shutter with no shutter sound or beep
Standby timerCustom settings menu > c Timers/AE lock > c3 Power off delay > Standby timer	No limit	Mutes the standby timer sound, so carry a spare battery
Shutter typeCustom settings menu > d Shooting/display > d6 Shutter type	Auto	Takes over at rehearsals with Silent mode off
High-frequency flicker reductionPhoto shooting menu > High-frequency flicker reduction	Off	Turn on in M when test frames band, then leave it on
Photo flicker reductionPhoto shooting menu > Photo flicker reduction	OFF	It has no effect in Silent mode

Focus

Setting	Set it to	Why
Focus modePhoto shooting menu > Focus mode	Continuous AF	The sharp zone at 15 m is only about 1.15 m deep
AF-area modePhoto shooting menu > AF-area mode	Wide-area AF (C1)	A tall box about one dancer in size
AF/MF subject detection optionsPhoto shooting menu > AF/MF subject detection options	People	Finds her face and eyes inside the box
Blocked shot AF responseCustom settings menu > a Focus > a3 Focus tracking with lock-on > Blocked shot AF response	4	Holds focus when another dancer crosses in front
AF-C priority selectionCustom settings menu > a Focus > a1 AF-C priority selection	Focus + release	The first frame of a burst on a dark dancer waits for focus
AF activationCustom settings menu > a Focus > a6 AF activation	Shutter/AF-ON	A half-press focuses, as in Choosing an Autofocus Setup
Built-in AF-assist illuminatorCustom settings menu > a Focus > a11 Built-in AF-assist illuminator	OFF	Reaches only 1 to 3 m and would light up the hall

Drive and Lens

Setting	Set it to	Why
Release modePhoto shooting menu > Release mode	Continuous H	About 15.3 fps raw with the electronic shutter
Vibration reductionPhoto shooting menu > Vibration reduction	Sport	If offered with the Tamron, for unpredictable movement

Image and Files

Setting	Set it to	Why
Image qualityPhoto shooting menu > Image quality settings > Image quality	RAW	White balance and noise stay open to a careful edit
RAW recordingPhoto shooting menu > RAW recording	High efficiency★	The raw format File Formats picks for stage
Tone modePhoto shooting menu > Tone mode	SDR	HLG adds noise and weakens subject detection
White balancePhoto shooting menu > White balance	Preset manual	Measured in the front light at the rehearsal
Set Picture ControlPhoto shooting menu > Set Picture Control	Neutral	Stage light is already strongly coloured
Active D-LightingPhoto shooting menu > Active D-Lighting	Off	A dark stage should stay dark
High ISO NRPhoto shooting menu > High ISO NR	Normal	The default strength, and raw keeps the choice open
Secondary slot functionPhoto shooting menu > Secondary slot function	Backup	A performance cannot be repeated

Display

Setting	Set it to	Why
Starlight view (photo Lv)Custom settings menu > d Shooting/display > d11 Starlight view (photo Lv)	OFF	Toggled from a button on the darkest cues
Monitor mode	Viewfinder only	The rear screen stays dark in the auditorium

Two rows lean on chapters not yet mentioned. Secondary slot function is Backup, which records every picture to both cards (p. 457), because a performance cannot be repeated, as Card Slots argues. Backup needs SDR tone mode (p. 457), one more reason to stay there. Card Slots also counts the cost: with the SD card in slot 2, waits of nearly ten seconds after a fifty-frame burst. Continuous H is the release mode Release Modes chooses for stage.

The button map is the base map from Custom Controls, which already serves the stage. Four buttons keep their defaults (p. 625): Fn1 for White balance, held while the main command dial turns (p. 712), Fn2 for focus mode on the main dial and AF-area mode on the sub-dial (p. 713), the AF-ON button, and the Release mode/protect button (pp. 705, 712).

Three controls change, and each carries the hedge "where offered", because the roles a control accepts vary from control to control (p. 704). The Sub-selector center gets AF-area mode + AF-ON with Wide-area AF (L). Holding it switches to the larger area and focuses at once when a dancer breaks out of the tall box, and letting go returns to C1 (p. 705). Without that role, Custom Controls falls back to AE lock only. The Video record button toggles Starlight view (photo Lv) (p. 711) and the Illuminator button toggles Silent mode (p. 710), so the two settings you change during an evening are one press apart.

Button map · Custom setting f2

Stage Dance

Custom settings menu > f Controls > f2 Custom controls (shooting)

Point at a highlighted control, or a name in the table, to match the two.

Control	Set to	Factory default	Why
Fn1 button	White balance	White balance	Hold and turn the main dial, and measure the preset here
Fn2 button	Focus mode/AF-area mode	Focus mode/AF-area mode	Main dial for focus mode, sub-dial for AF-area mode
AF-ON button	AF-ON	AF-ON	Focus from the thumb when a half-press is awkward
Sub-selector center	AF-area mode + AF-ON	AE/AF lock	Hold for Wide-area AF (L) when she leaves the box, where offered
Release mode/protect button	Release mode	Release mode	The default, so Continuous H is one hold away
Video record button	Starlight view (photo Lv)	Live view info display off	Brightens the view on the darkest cues, where offered
Illuminator button	Silent mode	LCD illumination	On for the show, off at rehearsal, where offered

09.Beginner Mistakes

• Testing for stripes under work lights. Stripes depend on the fixtures, and the working lights between cues are not the ones you will photograph. Test under the show's own cues.
• Stopping down for more depth. Going from f/2.8 to f/5.6 costs two stops, so ISO 6400 becomes ISO 25600, and beyond f/5.6 the aperture is at its most audible in Silent mode (p. 846).
• Neutralising the gels. A grey backdrop that was meant to be blue is a mistake, not a correction. Balance for the front light on the faces.
• Judging exposure by eye in a dark hall. Use the blinking highlights and the histogram (pp. 225, 227).
• Choosing 3D-tracking for a solo. It can lose a dancer whose colour or brightness changes with the cue (p. 126). Keep the tall C1 box.
• Forgetting the settings the next morning. Exposure compensation survives switching off (p. 152), and a flash will not fire while Silent mode is on (p. 846).

10.Related Chapters

• Shutter Types: the readout behind stripes and the full flicker arithmetic.
• Silent Shooting, Timers and Time-Lapse: Silent mode and everything it changes.
• Metering: why Highlight-weighted suits a spotlit stage.
• ISO and Auto ISO: the ceiling, the compensation and where noise comes from.
• White Balance: Preset manual and choosing a colour temperature.
• Choosing an Autofocus Setup: the stage focus setup this recipe uses.
• Custom Controls: the base button map and its fallbacks.
• Card Slots: Backup and what the SD card's pace costs.
• Dance Video on a Gimbal: the same dancers, filmed instead of photographed.