LENSES & SENSORS

Crop Factor & Equivalent Lens Calculator

Compare framing across full frame, APS-C, Micro Four Thirds and smaller sensors without confusing exposure with depth of field.

CORE FORMULAequivalent focal length = focal length × crop factorInputs stay in this browser.

INPUTS

Set your shot

Actual focal lengthmmMaximum aperturef/Sensor crop factor

LIVE RESULT

Your working numbers

Full-frame field-of-view equivalent52.5 mm

Depth-of-field equivalentf/2.7For matched framing and position

Actual lens35 mm f/1.8Focal length and exposure aperture do not change

Equivalent aperture describes similar framing and depth of field—not the exposure setting or physical aperture.

READ THE RESULT

Use the estimate as a planning tool.

Camera specifications, tolerances and shooting conditions can change a real result. We expose the assumptions so you can choose a margin that fits the consequence of getting it wrong.

Read the related field guide