Wildlife with a Long Telephoto

A red-shouldered hawk sits on a dead branch over a creek, 12 m from where you stand. Between you and the bird, a screen of bare twigs crosses the view about 4 m out. You have the Nikkor Z 180-600mm f/5.6-6.3 VR at 600 mm, and the hawk fills most of the frame. It is still, except for its head, which turns every few seconds to scan the water.

Three things go wrong on the first attempt. The camera focuses on the twigs. The frames taken while the head turned are soft, even though stabilisation is on. And when the hawk drops off the branch, your finger arrives after the bird has gone, so the burst opens on an empty perch.

This chapter fixes all three with one setup for perched and slow-moving wildlife, handheld or on a gimbal head, and ends with it as a recipe card and a button map. Each setting has a home chapter, linked where it comes up, so this one shows how they work together.

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

01.Two Kinds of Blur

A soft frame from a long lens has one of two causes, and they need different cures. The first is camera shake. Your hands, or a tripod in the wind, swing the lens through a tiny angle during the exposure, and the whole picture smears. The second is subject motion. The camera is steady, but the hawk's head moves while the shutter is open, so the head smears and the branch stays sharp.

Vibration Reduction works through the first cause and arrives at the old reciprocal rule: handheld, use a shutter speed no slower than one over the focal length, which at 600 mm means 1/600 s. Vibration reduction (VR), which moves the sensor or a lens element to cancel shake, lets you go well below that on a still subject. But VR cancels movement of the camera and does nothing for movement in front of it, so for a perched bird the real question is how fast its head moves.

Subject Motion in Numbers

Start with the hawk. It is $d = 12$ m from the camera and the lens is at $f = 600$ mm. When a subject is far away compared with the focal length, the lens forms an image about $f/d$ times the subject's real size. That ratio is the magnification, written $m$:

$$m \approx \frac{f}{d} = \frac{600 \text{ mm}}{12\,000 \text{ mm}} = 0.05$$

So for every millimetre the head moves, its image on the sensor moves 0.05 mm. Suppose the eye travels at an illustrative $v = 0.2$ m/s, or 200 mm/s, as the head turns. Its image then crosses the sensor at $m v = 0.05 \times 200 = 10$ mm/s. During an exposure lasting $t$ seconds, the image travels a blur length $b$, in millimetres, of

$$b = m \, v \, t$$

At 1/500 s, $t = 0.002$ s and $b = 10 \times 0.002 = 0.02$ mm.

A blur length means more once it is counted in pixels, the sensor's individual light-measuring sites. The sensor is 35.9 mm wide (p. 997) and a Large picture is 6,048 pixels across (p. 998), so one pixel is $p = 35.9 / 6048 \approx 0.00594$ mm wide. The blur in pixels is $n = b / p$, and at 1/500 s that gives $n = 0.02 / 0.00594 \approx 3.4$ pixels. The table repeats the sum at four shutter speeds.

Two conventions sit under these numbers. The speed is measured across the line of sight, since motion straight toward the camera barely moves the image. And $m \approx f/d$ treats the zoom as one thin lens, which the 180-600 is not, so read the table for proportions rather than exact sizes.

The proportions are what matter. Vibration Reduction treats about 0.03 mm as the most blur a full-frame picture can carry and still look sharp in an ordinary print. At 1/500 s the head alone spends two thirds of that allowance before any shake is counted, and a full-size view on screen shows more than three pixels of smear around the eye. At 1/1000 s its share falls to a third, under two pixels.

That is why this recipe sets 1/1000 s for a perched bird that is awake and moving. The speed is already faster than the reciprocal rule's 1/600 s, so shake is no longer the limit, and VR becomes margin rather than rescue. For a dozing bird the table says slower speeds cost little, and VR earns its keep there.

02.Shutter Speed First, in M

With the 180-600 at its long end, the aperture is f/6.3 wide open, the third of a stop darker than f/5.6 that ISO and Auto ISO counts. For wildlife at a distance I leave it there, because stopping down spends light the shutter speed needs. That leaves shutter speed as the setting worth choosing, and it points to mode M, manual exposure, with Auto ISO turned on.

ISO is the camera's amplification of the sensor's signal, and each doubling of ISO is one stop, the photographer's unit for a doubling or halving of light. In M you set shutter speed and aperture yourself, and with Auto ISO on, the camera adjusts ISO to give the metered exposure at those settings (p. 145). Exposure Modes recommends exactly this pairing for birds and wildlife.

Auto ISO sensitivity control comes set to ON, with Maximum sensitivity at 64000 (p. 446). Maximum sensitivity is the ceiling, the highest ISO the camera may choose (p. 467). This recipe lowers it to 25600, the value ISO and Auto ISO suggests for M. In M it does not cut noise, since shutter speed and aperture fix the light. It makes the frame come out visibly dark once the light has outrun the shutter speed.

Exposure compensation still works in M with Auto ISO on. It shifts the ISO the camera picks and so changes the exposure (p. 152). That is how you correct a meter fooled by a white egret on dark water, a case Metering works through. Whatever you dial in is still there after the camera is switched off and on again (p. 152), so check it before the next outing.

A Light Budget for the Take-Off

Speeding up the shutter has a cost in light, and the cost can be counted. Suppose the perched hawk meters at an illustrative ISO 1600 at 1/1000 s and f/6.3, and for the take-off you turn to 1/2000 s. With $t_1$ the old exposure time and $t_2$ the new one, the number of stops of light lost is

$$\Delta = \log_2 \frac{t_1}{t_2} = \log_2 \frac{1/1000}{1/2000} = \log_2 2 = 1$$

where $\log_2$ asks what power of two gives the number inside. One stop lost means Auto ISO doubles the ISO, to 3200. The ceiling then sits $\log_2 (25600 / 3200) = \log_2 8 = 3$ stops higher, so the light can fall to an eighth of its present level before Auto ISO runs out.

Past the ceiling M has nothing left to adjust, so the picture comes out darker than the meter wants. I expect the exposure indicators (p. 145) to show the shortfall, though Nikon does not describe this case. That is the bargain of M with Auto ISO: you keep the shutter speed the subject needs, and a dark frame is the price when the light gives out.

03.What Minimum Shutter Speed Does

Auto ISO has a third setting, and it is the one most often misread. Minimum shutter speed is the slowest shutter speed the camera accepts before it raises ISO, and it applies only in modes P and A, programmed auto and aperture-priority auto, where the camera chooses the shutter speed itself (p. 467). At Auto, its default (p. 446), the floor comes from the lens's focal length, faster for longer lenses to keep shake out. Press right on the multi selector with Auto highlighted and it can be fine-tuned faster or slower, with faster settings meant for fast-moving subjects (p. 467). ISO and Auto ISO recommends Auto fine-tuned faster for a zoom such as the 180-600.

For wildlife it is weaker than it looks. The floor knows the focal length but not the bird, so it is a shake rule, and the table above shows that a turning head needs more. It also gives way. Once ISO reaches Maximum sensitivity, the shutter speed may drop below the minimum (p. 467), so in failing light mode A quietly hands back the speed you were counting on. M fails the other way, with a dark frame at the speed you chose. I prefer that failure, because brightening a frame in an edit is routine and removing blur is not.

In the high-speed release modes C15 to C120 the setting does not apply at all (p. 157), so the floor would vanish as the bird leaves. The recipe still sets it to Auto fine-tuned faster, ready for mode A on a static scene, but M does the work.

04.Holding 600 mm Still

Handheld

At 1/1000 s the reciprocal rule is met with room to spare, so handheld technique is mostly about framing and stamina. I carry the lens by its collar foot with my left hand under it, so the weight rests on the palm rather than on a gripping wrist, and I keep my elbows against my chest.

Leave Vibration reduction at Normal, its default (p. 447), which Nikon describes as the choice for static subjects (p. 498). Nikon also recommends waiting for the image in the display to stabilise before shooting, and warns that in Normal the viewfinder image may jiggle before the release, which is how VR works rather than a fault (p. 498). Raise the camera, let the view settle, then press.

On a Tripod With the Gimbal Head

For a long wait at a known perch, the lens goes on the K&F Concept X284C4 legs carrying the SIRUI PH-10 gimbal head. A gimbal head holds a long lens in a cradle that pivots around the lens's balance point, so once balanced the lens stays wherever you leave it and you can rest your arms without it nodding forward. Balance it by sliding the collar foot forward or back in the head's clamp until the lens holds its angle when released.

Nikon recommends Normal or Sport on a tripod as well, with the caveat that on certain tripods and in certain conditions Off can do better (p. 498). Vibration Reduction's advice is to start at Normal and test Off on your own support. Compare frames of the empty branch both ways at full size. To swing the gimbal after a heron walking the bank, Sport is Nikon's choice for panning, and in either mode VR leaves the sweep itself alone and corrects only the shake on top of it (p. 498).

05.Focus That Ignores the Twigs

Choosing an Autofocus Setup gives a focus setup for perched wildlife, and this recipe takes it whole. Continuous AF (AF-C) keeps adjusting focus while the bird shifts its weight (p. 121). Wide-area AF (C1), a focus box whose size you set (p. 125), goes small and aims at the bird past the twigs. It is one of the AF-area modes in which subject detection works (p. 128).

Birds subject detection puts the focus point on the bird's face, or on an eye when it finds one, and on the whole bird when it finds neither (p. 127). For a deer or a fox, Animal is the nearest choice, though Subject Detection warns that such animals may or may not be recognised. Custom Setting a3 Blocked shot AF response goes to 4, or 5 among swaying reeds, so a stem drifting across does not steal focus (p. 633).

Custom Setting a6 AF activation goes to AF-ON only, so a half-press of the shutter-release button no longer focuses and the AF-ON button does, with Out-of-focus release at Enable, so a full press always takes the picture (p. 637). This split is called back-button focus. Custom Setting a1 AF-C priority selection stays at Release, its default (p. 623). And a11 Built-in AF-assist illuminator goes OFF, because Nikon warns that its light may harm the eyes of birds and animals (p. 129).

Fencing Off the Twigs

The twigs are the problem a focus limiter exists for. Custom Setting a15 Focus limiter setting added in Firmware 2.00 confines autofocus to a range of distances you choose, anywhere between 0.1 and 999 m, with a Z mount lens attached (p. 648). With the twigs at 4 m and the hawk at 12 m, a range of 8 to 20 m hides the twigs from autofocus and leaves the bird room to move along the branch. Focus Limiter, Saved Positions and Manual Focus explains why a generous far limit costs almost nothing, since far distances take up little of the focusing range.

To set the range, open Limit range, put the focus point on something at the near distance and press the AF-ON button, then put it on something at the far distance and half-press the shutter-release button (p. 649). Nikon does not say whether AF-ON only affects this. If the half-press sets nothing, turn the sub-command dial (p. 649). Keep both values among the numbers the display shows in white, since Nikon warns that values in yellow can make the camera focus outside the range or fail to focus (p. 649). While the limiter is on, an icon in the display says so (p. 648).

The lens has its own limit switch, and the two must agree. Nikon asks for the lens switch at FULL whenever Limit range is in use (p. 650). The focus-limiter chapter therefore puts the 180-600's switch at 6 m with a15 off when roaming and at FULL with a15 on at a perch, and so does this recipe. The range also belongs to the lens it was set with. Change lenses and it stops applying. Refit the 180-600 and the range returns, unless you reset it for the other lens (p. 650).

Walking along the creek, a15 should be off, because the next bird will not sit between 8 and 20 m. Going into the menu at every perch is too slow, so the recipe gives the Focus limiter role to the lens's buttons. Pressing a control with that role turns the limiter on, pressing again turns it off, and holding it jumps straight to the Limit range display (p. 705).

06.When the Bird Leaves

The take-off is the frame most people want and the one reaction time loses. Pre-Release Capture explains the cure in full. In the high-speed release modes, which Nikon calls High-Speed Frame Capture + and labels C15, C30, C60 and C120 for 15 to 120 frames per second (p. 154), the camera can keep a rolling store of frames in its buffer, its fast internal memory, while the shutter-release button is half-pressed. A full press then saves the last part of that store along with the frames that follow (pp. 156, 665). Frames from before your finger moved are kept.

Pre-release burst comes set to None (p. 624), which leaves the feature off. Set it to the longest value offered, as Pre-Release Capture does, with Post-release burst at 1 s, long enough for a bird to clear the frame. That chapter chooses C60 for birds in the full FX frame, which C15 to C60 allow and C120 does not, since C120 is limited to the smaller DX crop (p. 157).

While the hawk sits, shoot in Continuous H (extended), which Release Modes, Frame Rates and the Buffer puts at about 14 frames per second with the default shutter type and about 20 with the electronic shutter (p. 154), plenty for a bird that only turns its head. When it crouches, leans forward or lifts its tail, the habits I watch for before a take-off, hold the release mode button and turn the main command dial to C60 (p. 156). Turn the shutter speed to 1/2000 s or faster, as Pre-Release Capture suggests for birds, and half-press. A green dot in the Pre-Release Capture icon shows buffering is under way (p. 665). When the bird goes, press the rest of the way.

With a6 at AF-ON only the half-press no longer focuses, but Nikon ties the buffering to the half-press itself (p. 665), so the thumb holds focus on AF-ON while the index finger keeps the buffer running. Back-Button Focus reads the pages the same way and suggests confirming the green dot on your own camera, since Nikon never discusses the combination.

The buffering does not wait forever. After about 90 seconds of half-press, Pre-Release Capture is cancelled, and a full press then records no pre-release frames. The icon starts flashing 30 seconds before that, and lifting your finger and half-pressing again starts it afresh (p. 665). A hawk that sits for ten minutes therefore needs a lift and a fresh half-press every minute or so.

The C modes give some things up. They record JPEG only, a finished and compressed picture rather than the raw sensor data a NEF file keeps, and always at Large size (p. 157), which is why the recipe sets Image quality (HSFC) to JPEG fine. Shutter speeds in C15 to C60 run from 1/16000 to 1/60 s, which 1/2000 s sits well inside, and ISO stops at 64000 even if a Hi value is chosen (p. 157), above the recipe's 25600 ceiling. Subject detection may also perform worse in these modes (p. 130), so I make sure the focus box already holds the bird before I switch.

07.The Recipe

The recipe card gathers every setting above in one place, grouped by the job each one does.

Field recipe · Wildlife

Wildlife with a Long Telephoto

Exposure

Setting	Set it to	Why
Mode dial	M	You choose the shutter speed and Auto ISO sets the brightness.
Shutter speed, perched	1/1000 s	Holds a head turning at the illustrative 0.2 m/s under two pixels at 12 m.
Aperture at 600 mm	f/6.3, wide open	Stopping down spends light the shutter speed needs.
Auto ISO sensitivity controlPhoto shooting menu > ISO sensitivity settings > Auto ISO sensitivity control	ON	ISO follows the light while shutter and aperture stay put.
Maximum sensitivityPhoto shooting menu > ISO sensitivity settings > Maximum sensitivity	25600	A dark frame warns the light has run out.
Minimum shutter speedPhoto shooting menu > ISO sensitivity settings > Minimum shutter speed	Auto, fine-tuned faster	Ready for mode A on a still scene. Mode M ignores it.
MeteringPhoto shooting menu > Metering	Matrix metering	Fine for most scenes. A white bird needs highlight-weighted.

Focus

Setting	Set it to	Why
Focus modePhoto shooting menu > Focus mode	Continuous AF	Keeps adjusting as the bird shifts on the branch.
AF-area modePhoto shooting menu > AF-area mode	Wide-area AF (C1)	A small custom box aims past the twigs at the bird.
AF/MF subject detection optionsPhoto shooting menu > AF/MF subject detection options	Birds	Finds a bird's face or eye. Animal may not recognise a deer or fox.
Blocked shot AF responseCustom settings menu > a Focus > a3 Focus tracking with lock-on > Blocked shot AF response	4	A stem drifting across does not steal focus. Use 5 in reeds.
AF activationCustom settings menu > a Focus > a6 AF activation	AF-ON only (Out-of-focus release: Enable)	The thumb focuses and a full press always fires.
AF-C priority selectionCustom settings menu > a Focus > a1 AF-C priority selection	Release	The default. The shutter fires when you press.
Built-in AF-assist illuminatorCustom settings menu > a Focus > a11 Built-in AF-assist illuminator	OFF	Nikon warns the lamp may harm the eyes of birds.

Focus Limiter

Setting	Set it to	Why
Focus limiterCustom settings menu > a Focus > a15 Focus limiter setting > Focus limiter	ON	At a fixed perch only. Turn it off when walking.
Limit rangeCustom settings menu > a Focus > a15 Focus limiter setting > Limit range	Nearest 8 m, Farthest 20 m	Hides twigs at 4 m and gives a bird at 12 m room.
180-600mm limit switch	FULL with a15 on, 6 m when roaming	Nikon asks for FULL whenever Limit range is in use.

Stabilisation and Support

Setting	Set it to	Why
Vibration reductionPhoto shooting menu > Vibration reduction	Normal	Nikon's choice for static subjects.
Support at a perch	K&F Concept X284C4 legs with SIRUI PH-10 gimbal head	A balanced lens holds its angle while you rest.
VR on the gimbal	Normal, then test Off	Nikon says Off may suit some tripods.

Take-Off

Setting	Set it to	Why
Release modePhoto shooting menu > Release mode	C60	Fast enough for a take-off and keeps the full FX frame.
Shutter speed, take-off	1/2000 s or faster	Wings move far faster than a turning head.
Pre-release burstCustom settings menu > d Shooting/display > d3 Pre-Release Capture options > Pre-release burst	Longest value offered	Keeps frames from before your finger moved.
Post-release burstCustom settings menu > d Shooting/display > d3 Pre-Release Capture options > Post-release burst	1 s	Long enough for the bird to clear the frame.
Image quality (HSFC)Photo shooting menu > Image quality settings > Image quality (HSFC)	JPEG fine	The C modes record JPEG only, so keep the finer one.

Perched Bursts and Files

Setting	Set it to	Why
Release modePhoto shooting menu > Release mode	Continuous H (extended)	About 14 fps of raw files at the default shutter type.
Image qualityPhoto shooting menu > Image quality settings > Image quality	RAW	Keeps the most room for editing perched frames.
Choose image areaPhoto shooting menu > Image area > Choose image area	FX (36×24)	The full frame, which C60 also allows.
Silent modeSetup menu > Silent mode	OFF	Turn it on only for a shy subject close by.

The button map shows which control carries which role for this setup. It is the base map from Custom Controls for modes P, S, A and M, which already serves perched wildlife, with one addition: the Focus limiter role on the Lens Fn button.

Button map · Custom setting f2

Wildlife with a Long Telephoto

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
AF-ON button	AF-ON	AF-ON	The thumb does all the focusing.
Sub-selector center	AF-area mode + AF-ON	AE/AF lock	Holds Wide-area AF (L) and focuses, where offered.
Fn2 button	Focus mode/AF-area mode	Focus mode/AF-area mode	The default, for changing the AF-area mode quickly.
Release mode/protect button	Release mode	Release mode	Hold it and turn the main dial to reach C60.
Illuminator button	Silent mode	LCD illumination	Electronic shutter for a shy subject, where offered.
Lens Fn buttonNot on the drawing	Focus limiter	AE/AF lock	Press toggles the limiter and a hold sets the range, where offered.
Lens control ringNot on the drawing	Focus (M/A)	(Varies with lens)	Turn the ring to correct focus by hand.

The AF-ON button keeps AF-ON and does all the focusing. The Sub-selector center carries AF-area mode + AF-ON where offered, which switches to a preset AF-area mode and starts autofocus while pressed, then restores the previous mode on release (p. 705). Its preset is Wide-area AF (L), the larger box, for a bird that walks off the end of the branch. The Fn2 button and the Release mode/protect button keep their defaults, Focus mode/AF-area mode and Release mode (p. 625), and the second is the switch to C60.

The Illuminator button carries Silent mode where offered, as Custom Controls sets it, for a shy subject close by. Silent mode uses the electronic shutter, which also brings the faster rate in Continuous H (extended) (p. 154). The Lens control ring carries Focus (M/A), which lets you turn the ring to override autofocus while the shutter-release button is half-pressed, with autofocus back after you lift and half-press again (p. 714). Nikon does not say how it behaves with back-button focus in photo mode. The same role in the video custom controls refocuses with a control assigned AF-ON as well as with a half-press (p. 756), which is a hint rather than proof for stills, so try it on a twig before you rely on it.

The Lens Fn button carries Focus limiter, where offered, in place of its default AE/AF lock (p. 626). Nikon's guide to the 180-600 calls all four barrel buttons L-Fn buttons and shows no L-Fn2, so the Lens Fn2 button entry stays at its default. After setting it, press an L-Fn button and watch for the limiter icon.

08.Beginner Mistakes

Trusting VR to freeze the bird. VR steadies the camera, not the subject. In the example above, a head turning during a 1/250 s exposure smears about 7 pixels however steady the lens is.

Leaving the limiter on. A bird that lands at 6 m cannot be focused while the range starts at 8 m, and a hand resting on the barrel can turn the limiter on by accident. When focus refuses a subject, look for the limiter icon (p. 648).

Setting a range with the lens switch at 6 m. Nikon asks for FULL whenever Limit range is in use (p. 650). Look at the barrel each time you turn a15 on.

Holding the half-press too long. After about 90 seconds Pre-Release Capture is cancelled, and the take-off you then catch has no frames from before the press (p. 665). Lift and half-press again when the icon flashes.

Expecting raw files from C60. The C modes record JPEG only (p. 157). Switch back to Continuous H (extended) once the bird has gone.

Forgetting exposure compensation. It survives the camera being turned off (p. 152), so the white egret's correction is still dialled in for the brown hawk next morning.

09.Related Chapters

• Pre-Release Capture: the rolling buffer, its arithmetic and its limits.
• Vibration Reduction: the reciprocal rule and what a VR rating in stops means.
• ISO and Auto ISO: every Auto ISO setting, with its defaults.
• Focus Limiter, Saved Positions and Manual Focus: setting a range and living with the lens's own switch.
• Choosing an Autofocus Setup: the perched-wildlife focus setup in full.
• Back-Button Focus: why the thumb focuses and the finger releases.
• Custom Controls: the base button map this recipe extends.
• Birds in Flight: the setup for once the bird is in the air.