Translate focal length and optional aperture equivalence across sensor formats. Perfect for understanding how your lenses perform on different cameras.
Equivalent focal length matches field of view: focal × (target crop ÷ source crop). Aperture equivalence is for depth-of-field comparison only.
Scenario: Comparing 50mm f/1.8 on full frame vs Micro 4/3
Setup: Source: Full frame (1.0) → Target: Micro 4/3 (2.0)
Equivalent focal length: 50mm × (2.0 ÷ 1.0) = 100mm
DoF-equivalent aperture: f/1.8 × (2.0 ÷ 1.0) = f/3.6
Meaning: Your 50mm f/1.8 on full frame looks and feels like a 100mm f/3.6 on Micro 4/3
The ratio of diagonal measurement between a full frame sensor and your camera's sensor. Smaller sensors have higher crop factors.
Smaller sensors capture a narrower portion of the image circle, effectively cropping the image and making it appear more zoomed in.
No! f/2.8 is f/2.8 regardless of sensor size. Only depth of field appearance changes.
When comparing depth of field between different sensor formats, or planning a look you want to recreate on different gear.
For lens selection purposes, yes. If you want "50mm full frame look" on APS-C, use a 35mm lens (50 ÷ 1.5).
Larger sensors typically perform better at high ISOs due to larger pixel sizes, but this tool focuses on focal length and DoF.
Field of View Calculator · Hyperfocal Distance · Equivalent Exposure