Best Camera Settings for Aurora Photography: ISO, Aperture, Shutter Speed

The three exposure variables and how they interact

Every aurora exposure is a balance between three variables: ISO (sensor sensitivity), aperture (lens opening), and shutter speed (how long the shutter stays open). Changing any one of them affects the brightness of the final image; the goal is to find the combination that exposes the aurora correctly without introducing too much noise (from high ISO) or blurring the aurora's movement (from too-long shutter speed).

• ISO: Higher ISO = brighter image, more noise. Modern full-frame sensors can handle ISO 3200 without severe noise; crop sensors and phones start showing significant noise above ISO 1600.
• Aperture: Wider (lower f-number) = brighter image, less depth of field. For aurora, you want maximum depth of field (everything from the foreground to infinity in focus), so use your widest aperture. Stopping down (f/4, f/5.6) is only useful if your lens has severe coma or aberrations at maximum aperture.
• Shutter speed: Longer = brighter image, more motion blur (aurora and stars both move). Shorter = darker image, less blur. The aurora's rate of movement is the key constraint — a fast substorm requires a short shutter to freeze the movement; a slow glow can tolerate a longer exposure.

These three variables combine multiplicatively. Halving the shutter speed (from 10 s to 5 s) requires either doubling the ISO (from 1600 to 3200) or opening the aperture by one stop (from f/2.8 to f/2.0) to maintain the same exposure brightness.

Quick-reference settings table

Starting settings by camera type and aurora condition:

All entries assume a wide-angle lens: 14–20 mm full-frame equivalent. If you're using a longer focal length, shorten the shutter speed proportionally to prevent star trails (500 Rule below).

Full-frame mirrorless / DSLR settings

Full-frame sensors (Sony A7 series, Nikon Z6/Z7/Z8/Zf, Canon R5/R6/R8, Nikon D750/D810/D850) have the best high-ISO performance. ISO 3200 is clean on most modern full-frame bodies; some (Sony A7R V, Nikon Z9) are usable to ISO 6400 for aurora.

Base settings for a moderate aurora night:

• Mode: Manual (M)
• ISO: 1600
• Aperture: f/1.8 or f/2.0 (or whatever your lens's best wide aperture is)
• Shutter: 10 seconds at 20mm focal length
• White balance: Manual, 4000 K
• Focus: Manual, set to infinity on a bright star
• Format: RAW (mandatory) + JPG (optional)
• Drive mode: 2-second self-timer or remote release
• IBIS: Off

For a fast, active substorm: raise ISO to 3200, shorten shutter to 4–6 seconds. Check your histogram — you want the exposure slightly to the left of centre (slightly underexposed) to avoid clipping bright aurora centres.

APS-C crop sensor settings

APS-C sensors (Sony A6x00, Fujifilm X-T/X-S series, Canon R50/R10, Nikon Z30/Z50, Pentax KF) have smaller pixels than full-frame and show more noise at the same ISO. Effective ISO ceiling for aurora: 1600 for good results, 3200 for acceptable results, 6400 for emergency only.

The other consideration is focal length. An APS-C sensor with a 10mm lens gives the same angle of view as a 15mm full-frame lens (due to the 1.5x crop factor). This means the 500 Rule gives a longer maximum shutter speed for the same angle of view — a 10mm lens on APS-C allows 500 ÷ 15 = 33 seconds, whereas a 15mm lens on full-frame allows 500 ÷ 15 = 33 seconds also. The crop factor cancels when using equivalent angle of view lenses.

Practical APS-C starting settings:

• ISO: 1600
• Aperture: f/2.0 or widest available
• Shutter: 8 s at 12mm focal length (= 18mm full-frame equivalent)
• All other settings: same as full-frame

Micro Four Thirds settings

Micro Four Thirds sensors (Olympus/OM System, Panasonic Lumix G/GH series) have a 2x crop factor, meaning a 7mm lens gives a 14mm full-frame equivalent angle of view. The sensor is smaller than APS-C, so the practical ISO ceiling for clean aurora is about 1600; ISO 3200 is usable with modern AI noise reduction in post.

MFT advantages for aurora: the OM System OM-1/OM-5 has outstanding image stabilisation that's less relevant at short exposures on a tripod but helps for handheld aurora shots during bright displays. The smaller and lighter system is easier to carry on hikes to remote viewpoints.

MFT starting settings:

• ISO: 800–1600
• Aperture: f/1.8 (the Olympus M.Zuiko 17mm f/1.8 or Voigtlander 10.5mm f/0.95 are excellent options)
• Shutter: 6–8 s at 7–10mm focal length

Phone camera settings for aurora

Modern flagship phones (iPhone 15/16 Pro, Samsung Galaxy S24/S25 Ultra, Google Pixel 8/9 Pro) can capture the northern lights in specific conditions. The key is understanding the limitations:

• Phones work well for bright aurora (Kp 4+) during slow or stationary displays
• Phones struggle with fast-moving substorms — by the time night mode accumulates enough light, the aurora has moved
• Phone photos show more noise and lower dynamic range than camera RAW at the same scene

Phone settings for aurora:

• iPhone: Open Camera app → swipe to Video → Long Exposure mode (iPhone 16) or use Night mode with a tripod. ProRAW format for maximum quality. Set exposure time to 5–8 s in manual mode if available.
• Samsung Galaxy: Pro Video or Expert RAW app → manual mode → ISO 800–1600, shutter 6–10 s, f/1.8 (widest available). RAW capture on.
• Google Pixel: Night Sight mode on a tripod works remarkably well. Pro mode: ISO 800, shutter 5–8 s.
• All phones: use a mini-tripod (Joby GorillaPod or similar). Hand-holding a 6-second phone exposure produces unusable blur.

Settings for different aurora activity levels

Aurora activity changes rapidly. Here's how to adjust settings as the display develops:

Faint glow on the horizon (Kp 1–2, slow movement):
ISO 1600, f/2.0, 15–20 s. The aurora barely moves. You can use a longer exposure to brighten a dark image without blurring movement. Watch for star trails at this length — check the 500 Rule for your focal length.

Diffuse glow overhead (Kp 2–3, slight undulation):
ISO 1600, f/2.0, 8–10 s. Good mid-point settings. Review each frame and adjust if the aurora looks blown out (reduce ISO or shutter) or too dark (raise ISO or extend shutter).

Active aurora with visible rays (Kp 3–5, moderate movement):
ISO 1600–3200, f/2.0, 5–8 s. The aurora is moving visibly. Shorter shutter captures rays sharply. If you extend to 15 s, individual rays will smear into a diffuse glow.

Fast substorm, corona display (Kp 5+, rapid movement):
ISO 3200–6400, f/1.8–2.0, 2–4 s. This is the most challenging scenario. The aurora can move across the entire sky in 10 seconds during a substorm. At 4 s, you freeze the structure. At 15 s, you get a beautiful but blurry wash. For full-frame: ISO 3200 at 4 s is clean. For APS-C: ISO 3200 at 3 s with aggressive noise reduction in post.

The 500 Rule and star trail prevention

Stars move across the sky as Earth rotates, at a rate of 15 arcseconds per second. At long shutter speeds, this movement shows up as short trails rather than sharp points. The 500 Rule gives you the maximum shutter speed before trails become visible:

500 Rule: Max shutter speed (seconds) = 500 ÷ focal length (full-frame equivalent mm)

• 14mm: 500 ÷ 14 = 35 seconds
• 20mm: 500 ÷ 20 = 25 seconds
• 24mm: 500 ÷ 24 = 21 seconds
• 35mm: 500 ÷ 35 = 14 seconds

For APS-C cameras, use the full-frame equivalent (multiply actual focal length by 1.5): a 10mm lens on APS-C = 15mm full-frame equivalent → 500 ÷ 15 = 33 seconds.

The stricter NPF Rule produces shorter maximum shutter speeds (typically 40–60% of the 500 Rule result) for pixel-level star sharpness. For aurora photography where the aurora itself is the hero, the 500 Rule is generally adequate. For Milky Way photography where stars are the primary subject, use the NPF Rule.

White balance settings

Auto white balance (AWB) is unreliable for aurora photography — it shifts between frames as the aurora changes brightness and colour, producing inconsistent results across a sequence. Set white balance manually:

• 4000 K (Kelvin): Produces the most natural-looking aurora colours. The sky will be dark neutral grey-black, green aurora will look emerald rather than yellow-green, and stars will have a slight warmth.
• 3800–4500 K range: All work well. Lower (3800 K) makes the sky more blue-tinted; higher (4500 K) warms the image slightly toward magenta.
• Daylight or Flash presets: Often around 5500–6000 K — too warm for aurora, produces orange star colours and a yellow tint.
• Tungsten preset (3200 K): Too cool — sky looks very blue, aurora looks cyan.

If you shoot RAW (which you should), you can adjust white balance in post processing without any image quality loss. Set it to 4000 K in the field for accurate LCD review, then fine-tune when processing.

Common exposure problems and solutions

Stars look like blurry donuts instead of sharp points: Focus is slightly off. Switch to live view, zoom to 10x on a bright star, and refocus manually. This is the most common beginner issue.

Aurora looks smeared or motion-blurred: Shutter speed is too long for the aurora's movement speed. Drop to 3–5 seconds during active displays.

Image is completely dark: Check that the lens cap is off (yes, it happens), aperture is at minimum f-number, and ISO is at least 1600. Also check that the lens hasn't fogged over from condensation (see below).

Image is completely white / overexposed: Bright aurora at long shutter speed. Reduce shutter to 3–4 s or lower ISO to 800.

Foreground is black but sky is correctly exposed: Normal — the aurora is much brighter than the foreground at night. Use a torch to light-paint the foreground during a separate long exposure and blend in post, or use a 30-second foreground shot during an aurora-free moment.

Lens is fogging up: Condensation on the front element — common when moving from a warm car to cold air. Solution: allow 10–15 minutes for the lens to equalise to outdoor temperature before shooting. A lens warmer (USB or battery-powered) attached to the lens barrel prevents fogging during extended outdoor sessions.

Camera keeps hunting in autofocus and missing shots: Switch to manual focus (MF) on the lens. Autofocus cannot function in near-total darkness — it will hunt back and forth indefinitely.

Image is sharp but colours look wrong: Check white balance setting. 4000 K is the starting point for natural aurora colours. If the aurora looks neon-yellow-green, try reducing white balance to 3800 K. If everything looks purple-tinged, raise to 4500 K.