Calculation Result
Advanced Camera Format Calculator
Enter lens, aperture, sensor, distance, and resolution values. The result appears above the form after submission.
Example Data Table
This table shows common APS-C comparisons against a 36 × 24 mm full frame sensor.
| Crop sensor | Crop factor | Lens used | Full frame equivalent | Depth equivalent |
|---|---|---|---|---|
| Canon APS-C | 1.61x | 35 mm f/1.8 | 56.3 mm | f/2.9 |
| Nikon/Sony/Fuji APS-C | 1.53x | 50 mm f/1.8 | 76.4 mm | f/2.8 |
| Micro Four Thirds | 2.00x | 25 mm f/1.7 | 50 mm | f/3.4 |
Formula Used
Sensor diagonal:
diagonal = √(width² + height²)
Crop factor:
crop factor = full frame diagonal ÷ crop sensor diagonal
Full frame equivalent focal length:
equivalent focal length = lens focal length × crop factor
Depth of field equivalent aperture:
equivalent aperture = f-number × crop factor
Sensor area:
sensor area = width × height
Angle of view:
angle = 2 × arctan(sensor dimension ÷ (2 × focal length))
Aperture exposure does not change because of crop factor. A 35 mm f/1.8 lens remains a 35 mm f/1.8 lens. Equivalence helps compare framing, depth, and total light between different sensor sizes.
How to Use This Calculator
- Select the APS-C sensor preset. Choose custom for special sensor sizes.
- Enter crop sensor and full frame dimensions if needed.
- Add focal length, aperture, ISO, distance, and megapixels.
- Select the orientation and decimal precision.
- Press the calculate button.
- Review the result above the form.
- Use CSV or PDF export for reports, notes, or client planning.
APS-C vs Full Frame Calculator Guide
Sensor Size Basics
Sensor size changes framing. It also changes depth of field comparisons. A lens does not truly change focal length on another camera. The camera records a smaller or larger part of the image circle. That is why crop factor matters.
A full frame sensor is normally 36 mm by 24 mm. Many APS-C sensors are smaller. Canon APS-C is often near 22.3 mm by 14.9 mm. Nikon, Sony, Fuji, and Pentax APS-C bodies are often near 23.5 mm by 15.6 mm. Those dimensions create different crop factors. The common values are about 1.6x and 1.5x.
Why the Calculator Helps
This calculator helps compare both formats in practical terms. Enter your focal length, aperture, ISO, distance, and sensor size. The tool returns the full frame equivalent focal length. It also shows angle of view, sensor area, depth of field equivalent aperture, and total light comparison. These values are useful when buying lenses. They also help when matching footage from different camera bodies.
A 35 mm lens on a 1.5x APS-C body frames like a 52.5 mm lens on full frame. The exposure remains f/1.8 if the lens is set to f/1.8. However, depth of field looks closer to f/2.7 on full frame when framing and distance are matched. Noise comparisons also depend on sensor technology. Still, area based equivalence gives a helpful estimate.
Practical Camera Choice
Use the result as a planning guide, not a fixed rule. Real cameras vary in resolution, lens design, microlenses, processing, and dynamic range. A newer APS-C sensor may beat an older full frame sensor in some areas. A full frame body may give wider views, smoother background blur, and stronger high ISO performance. APS-C can give lower cost, lighter kits, and more apparent reach.
The best format depends on the job. Wildlife shooters may enjoy crop reach. Portrait shooters may prefer full frame blur. Travel users may value compact gear. Compare the numbers first, then choose the system that supports your style.
For video, also check crop modes and stabilization. They may add extra crop. Always test real framing before important paid work.
FAQs
What is APS-C?
APS-C is a camera sensor format smaller than full frame. Its exact size varies by brand. Because it is smaller, it captures a narrower view from the same lens.
What is full frame?
Full frame usually means a 36 mm by 24 mm sensor. It is based on the classic 35 mm film frame size and is larger than most APS-C sensors.
Does crop factor change focal length?
No. The physical focal length remains the same. Crop factor only describes how the smaller sensor frames the image compared with a full frame camera.
Does aperture change on APS-C?
Exposure aperture does not change. A lens set to f/2 remains f/2. Equivalent aperture is used only for comparing depth of field and total light.
Why is Canon APS-C different?
Canon APS-C sensors are often slightly smaller than other common APS-C sensors. That creates a crop factor near 1.6x instead of about 1.5x.
Which format is better for portraits?
Full frame often gives smoother background blur with similar framing. APS-C can still create strong portraits with fast lenses and careful subject distance.
Which format is better for wildlife?
APS-C is popular for wildlife because the narrower view makes distant subjects fill more of the frame. It can also reduce lens cost and weight.
Is this calculator exact for every camera?
It gives strong estimates using sensor math. Real results may vary because lenses, sensor design, resolution, processing, stabilization, and crop modes differ.