Crop Factor & Camera Angles
Crop factor, 35 mm equivalents and angles of view from real sensor dimensions.
Try before you buy.
- Free preview: the rules, dates and checks that apply to your figures, with every computed amount hidden.
- Locked until you unlock it: download and copy.
- Unlock: Pro pass, ₹179 for 30 days or ₹79 for 1 week, a one-time payment that never renews. Unlock: Pro pass, $5.99 for 30 days or $2.99 for 1 week, a one-time payment that never renews.
Ways to unlock shows how to get the full result.
Printing this result is locked in the free preview.
Locked in the free preview. Opens the ways to unlock this result.
Locked in the free preview. Batch runs unlock with a pass.
Locked in the free preview. Query results unlock with a pass.
About the Crop Factor & Camera Angles
Choose a sensor format — full frame, APS-H, two APS-C sizes, Micro Four Thirds, 1-inch type, medium format or one of two phone sensors — or enter your own sensor’s width and height. The calculator gives the crop factor from the diagonals, the 35 mm equivalent focal length, the equivalent f-number for depth of field, and the horizontal, vertical and diagonal angles of view of a rectilinear lens.
Each preset uses a real camera’s published sensor dimensions, so the APS-C formats come out at their true ratios rather than a rounded 1.5× or 1.6×. The free preview shows what is calculated with the values hidden; a Pro pass shows every value, with copy and text or JSON downloads.
How to use it
- Choose a sensor preset, or Custom size and enter the width and height in millimetres.
- Enter the lens’s focal length and the f-number you shoot at.
- Select Calculate to see the crop factor, the 35 mm equivalents and the three angles of view.
- With a Pro pass, copy the working or download it as text or JSON.
Formulas and sources
The full-frame reference is 36 × 24 mm, with a diagonal of √(36² + 24²) ≈ 43.27 mm. Crop factor = 43.27 mm ÷ the sensor’s diagonal; equivalent focal length = focal length × crop factor; equivalent f-number for depth of field = f-number × crop factor; angle of view = 2 × atan(sensor dimension ÷ (2 × focal length)). Sensor sizes: Canon EOS-1D Mark IV, Canon EOS 550D, Fujifilm X-T5, OM System OM-1 Mark II, Sony ZV-1F, Fujifilm GFX100 II, Samsung ISOCELL HP2 and Samsung ISOCELL GN1.
Limitations
- Format names such as APS-C 1.5×, 1.6× or 1-inch type are rounded labels; the calculation uses each preset’s published dimensions. Other cameras, and video modes that crop the sensor, need Custom size.
- Phone sensor sizes are worked out from the published pixel pitch and pixel count; optical masks, stabilisation and video crops can make the area in use smaller.
- The equivalent f-number compares depth of field at matched framing and output size; the exposure still follows the f-number you set. Angles assume a rectilinear lens, not a fisheye.
Privacy
On this device: nothing is sent
All calculations run on your device; nothing is uploaded or stored.
Frequently asked questions
What do I get without a pass?
Without a pass, Crop Factor & Camera Angles shows the rules, dates and checks that apply to your figures, with every computed amount hidden. Until you unlock it, the result can’t be downloaded or copied. A Pro, Premium or Ultimate pass, a one-time payment that never renews, unlocks the full result. The pricing page lists the passes and their prices.
Why does an APS-C preset not give exactly 1.5×?
Because the preset uses that camera’s published sensor size. The Fujifilm X-T5’s sensor is 23.5 × 15.7 mm, which gives a crop factor of about 1.53; “APS-C 1.5×” is a rounded name.
Does the equivalent f-number change the exposure?
No. It tells you which f-number on full frame would give the same depth of field at the same framing. The exposure depends on the f-number you actually set.