풀프레임, 캐논 APS-C(1.6x), 소니/니콘 APS-C(1.5x), 마이크로 포서드, 1인치, 후지 GFX, 페이즈원 센서 간 초점 거리와 조리개 값을 변환하세요.
| 센서 | 크롭 | 환산 초점거리 (mm) | 환산 조리개값 (DOF) |
|---|
화각은 크롭 팩터에 비례해 변합니다: 환산 초점거리 = 초점거리 × (원본 크롭값 / 대상 크롭값). 피사계심도도 동일한 방식으로 변합니다: 환산 조리개값 = 조리개값 × (원본 크롭값 / 대상 크롭값). 노출값은 변하지 않습니다 — f/2.8 렌즈는 어떤 센서에서도 f/2.8로 측광됩니다.
크롭 팩터는 36×24mm 풀프레임 센서(대각선 약 43.27mm)를 기준으로 합니다.
Two multiplications drive the whole tool: equivalent focal length = focal length x (source crop factor / target crop factor), and equivalent aperture = f-number x that same ratio. The headline result converts your lens to its full-frame equivalent, and the table underneath repeats the calculation against all seven sensors at once. Crop factors are ratios of sensor diagonal to full frame's 43.27 mm, so Micro Four Thirds at 2.0x sees half the field of view.
Set Source sensor first. The dropdown runs Phase One IQ4 (0.64x), Fuji GFX 50/100 (0.79x), Full Frame (1.0x), APS-C Nikon / Sony (1.5x), APS-C Canon (1.6x), Micro Four Thirds (2.0x) and 1-inch (2.7x). Focal length and aperture default to 50 mm and f/1.8, and six preset buttons load 24 mm f/1.4 through 200 mm f/2.8. The row matching your source sensor is highlighted in the comparison table.
The equivalent aperture column describes depth of field and total light gathered, not exposure. An f/1.8 lens still meters at f/1.8 on every sensor, so never dial the equivalent number into your camera. The tool also uses nominal crop factors rather than each body's exact sensor dimensions, ignores the aspect-ratio differences between formats such as 4:3 Micro Four Thirds against 3:2 full frame, and says nothing about noise differences between sensor sizes.
With APS-C Canon (1.6x) selected, a 50 mm f/1.8 reports as 80 mm at f/2.88 full-frame equivalent. On Nikon or Sony APS-C at 1.5x the same lens reports 75 mm at f/2.70. The framing and background blur change; the physical lens does not.
Depth of field depends on the physical diameter of the aperture relative to the format. Multiplying the f-number by the crop factor gives the full-frame f-number that would produce the same depth of field and collect the same total light across the frame.
No. Exposure is set by f-number, shutter speed and ISO regardless of sensor size, and the tool never adjusts your metering. The equivalent aperture figure exists purely to compare background blur and total light between different formats.
The tool uses 2.0x, so a 25 mm Micro Four Thirds lens frames like 50 mm on full frame. One-inch sensors are 2.7x. Medium format goes the other way: Fuji GFX is 0.79x and Phase One IQ4 is 0.64x, values below 1.0 that widen rather than crop.
Yes. Set Source sensor to the format you shoot, then read the row for the format you want to compare against. Because the table divides by the target's crop factor, Micro Four Thirds to APS-C Canon works without going through full frame first.
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