Color Temperature Meter+ vs Second View

Color Temperature Meter+ measures the colour temperature of the light around you in Kelvin, with tint, mired and the camera white balance to match, straight from your iPhone's camera. ▶ HOW IT MEASURES On iPhone the app reads the camera's own estimate of the light falling on the scene, the same estimate iOS uses to set white balance. Point the camera at a plain white or grey surface lit by the light you want to measure, not at the lamp itself. The reading settles within seconds and shows a ± range, so you can see how steady it is. When that estimate is not available, the app samples the centre of the frame instead, and you can calibrate it once on white paper in daylight. ▶ WHAT YOU SEE • Kelvin with a ± range, updating live • Mired value for filter and gel maths • Light type: golden hour, tungsten, fluorescent, LED, daylight, cloudy, shade • Tint (green or magenta) and Duv • Spectrum bar from 1,000 K to 15,000 K • The nearest camera white-balance preset: tungsten, fluorescent, flash, daylight, cloudy or shade ▶ FREEZE AND SAVE Tap Freeze to hold the current reading. A result card shows the Kelvin, mired, light type and matching white-balance preset, with Save Reading and Measure Again right below it. Saved readings keep their date and time. The latest 50 are kept, you can delete any of them, and you can export the list as CSV. ▶ PHOTOGRAPHY WB ASSIST Pick a target of 3200 K, 4300 K, 5500 K or 6500 K. The app shows the mired shift from the measured light to that target, the Kelvin to dial into your camera's custom white balance, and the CTO or CTB gel strength that closes the gap, from 1/8 upwards. ▶ REFERENCE CHART Thirteen common light sources, from candle flame (1,900 K) to clear blue sky (10,000 K), to compare with what you measured. ▶ HONEST LIMITS A phone camera is not a spectrometer. The app reports correlated colour temperature and tint, which is what matters for matching white balance and choosing gels. It does not measure spectral power distribution, CRI or TLCI, and two lamps with the same colour temperature but different spectra read the same. Mixed lighting gives a blend of the sources. Use it to set up shoots, match bulbs and check rooms; use a dedicated colour meter for critical colour work. ▶ PRIVACY Camera images are analysed on your device and are never uploaded. Available in 30 languages.

PLEASE READ FIRST Second View is not a camera app and does not take photos for you. It helps you frame, meter, and plan shots before you press the shutter on your own camera. The photos it saves are framing aids, not final images. --- Second View turns your iPhone into a precision field toolkit for analog photographers. Set your lens and format, and it crops the iPhone camera to match what your film camera will capture: same field of view, aspect ratio, and framing. Supports 35mm, medium format (6x4.5 through 6x17), large format (4x5, 5x7, 8x10), digital sensors, and custom sizes. VIEWFINDER Precise field-of-view matching for any focal length and format. Portrait or landscape, control side of your choice, preview rotation per kit. AUTOMATIC LENS SELECTION Frames through the sharpest back camera that holds your crop (ultra-wide, wide or tele), so long lenses look crisp. Calibrate each lens with a sheet of paper. FRAMES MODE Rangefinder-style bright lines for every lens in your kit at once. WORKSPACES Design your own control panel and switch layouts with a swipe. FREEZE MODE Hold a full-resolution still to compose rise and shift, spot-meter, and measure distance without the scene moving. LIGHT METER Pick your aperture and get the shutter speed. EV compensation, hyperfocal distance, auto/manual modes, and whole/half/third stops. SPOT METERING Meter the whole frame or a spot down to 1° through the telephoto. METER CALIBRATION Calibrate against your reference meter at several light levels, per lens. BELLOWS COMPENSATION Folds close-focus light loss into the reading, set manually or by LiDAR. LENS FILTERS Log ND, polarizer, and color filters. The meter compensates and every capture records them. RECIPROCITY CORRECTION 60 film stocks with accurate reciprocity curves, plus your own: Portra, CineStill, Tri-X, Velvia, ECN-2 and more. Exposures over one second are corrected automatically. FILM PREVIEW Simulate B&W film with color filters, and preview color-film white balance from the loaded stock. LONG EXPOSURE TIMER Countdown with a full-screen progress ring, on the Lock Screen and in the Dynamic Island, with an optional end alert. HARDWARE BUTTONS Map the volume buttons, Camera Control, the Action button or a Bluetooth remote to shutter, timer, freeze, lens steps and more. LIDAR DISTANCE AND PARALLAX Measure subject distance with LiDAR (iPhone 12 Pro and later) or enter it manually. Parallax between the iPhone and your lens is corrected automatically. RISE, FALL AND SHIFT Simulate view camera movements in 1mm steps, up to your kit's maximum travel. COMPOSITION TOOLS Rule of thirds, phi grid, golden triangle, square, and custom grids up to 12x12. Bubble level with roll and pitch. PANORAMA SIMULATION Preview a stitched multi-frame panorama and save it as a plan. SHOT CHECKLIST Run a per-kit checklist in the viewfinder. One step can fire the shutter automatically. CAMERA KITS Save complete setups and switch instantly: lenses, format, stocks, workspace, parallax, and checklist. Pick a body and the format picker shows only the masks it can shoot. FILM ROLL TRACKING Know which roll is loaded and when every frame was exposed. CAPTURE AND GALLERY Save a reference photo with the exact framing and full metadata: lens, format, stock, filters, exposure, rise/shift, GPS, and time. Export with a data overlay, add notes, group into rolls, and export a CSV log. --- Terms of Use : https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy policy : https://secondview.app/privacy