Lens Preview

Lens Preview helps you plan lens framing before a shoot. Point your iPhone at the scene, choose a lens and sensor setup, and preview the composition you can expect from the same viewpoint.

DISCOVER THE FOCAL LENGTHS YOU USE
Select the custom scouting lens, with an editable 13–800 mm default range. Log individual shots during a mock photoshoot, using a logarithmic slider or exact focal-length entry. End the session to review counts by focal length and see which prime or zoom ranges cover your choices. Try a suggested lens directly in the viewfinder. Sessions and their original sensor/adapter setups stay on your device.

KEEP THE PHOTO, OR JUST THE LOG
Scouting shots always keep their local focal-length record. Optionally save a framed photo to Photos, with no label or a simulated focal-length label at bottom left or bottom right. Photo saving starts on with a bottom-left label. Counts remain when photo saving is off or an export fails.

BUILD YOUR LENS LIBRARY
Add your own prime and zoom lenses, edit their names and focal ranges, and swipe to remove them. Each lens remembers its last focal length. Start with nine included presets: 12 mm, 50 mm, 100 mm, 400 mm, 100–400 mm, 24–105 mm, 28–70 mm, 24–70 mm, and 16–35 mm.

COMPARE SENSORS AND ADAPTERS
Choose MF, FF, APS-C 1.5, APS-C 1.6, or M4/3. Add a 1.4× or 2× teleconverter, or a 0.71× speed booster with a crop-sensor preset. MF represents the common 44 × 33 mm format.

SEE YOUR COMPOSITION
Use 3:2, 16:9, or 17:9 framing in portrait or landscape. Select an orientation explicitly, or let the device rotate automatically. Landscape uses the left-turn grip, keeping the camera corner on the left. Isolate the selected composition with black bars, or keep a wider context with guides for the wide end, selected focal length, and maximum zoom. Move the slider or tap an exact focal-range endpoint.

SAVE A REFERENCE
Save a still comparison for a prime lens. For a zoom, record an automatic wide-to-long sweep, hold maximum zoom for a second, then return wide. Choose one- or two-second ramps. Stills and silent videos save to Photos for later comparison.

DESIGNED FOR SCOUTING
The app chooses among the rear cameras available on your iPhone. It warns when a requested frame is wider than the phone can show. Very long focal lengths enlarge the preview and may look soft. Lens Preview estimates angle of view; your real lens can differ through distortion, focus breathing, parallax, stabilisation, or a camera-specific recording crop. It does not simulate depth of field or exposure.

Designed for iPhone 12 and later with iOS 17 or later. Camera access is required for the live viewfinder; add-only Photos permission is required to save comparisons. No account, microphone, advertising, or analytics SDK is included. Lens setups stay on your device. One-time purchase, with no subscription or in-app purchases.