फुल फ्रेम, APS-C Canon (1.6x), Sony/Nikon APS-C (1.5x), Micro Four Thirds, 1-इंच, Fuji GFX और Phase One सेंसर के बीच फोकल लंबाई और अपर्चर बदलें।
| सेंसर | क्रॉप | समतुल्य फ़ोकल (mm) | समतुल्य अपर्चर (DOF) |
|---|
फ़ील्ड ऑफ़ व्यू क्रॉप फ़ैक्टर के अनुसार बदलता है: समतुल्य फ़ोकल = फ़ोकल × (सोर्स क्रॉप / टारगेट क्रॉप)। डेप्थ ऑफ़ फ़ील्ड भी उसी तरह बदलती है: समतुल्य अपर्चर = अपर्चर × (सोर्स क्रॉप / टारगेट क्रॉप)। एक्सपोज़र नहीं बदलता — f/2.8 लेंस किसी भी सेंसर पर f/2.8 पर ही मीटर करता है।
क्रॉप फ़ैक्टर 36×24 mm फ़ुल-फ़्रेम सेंसर (विकर्ण ≈ 43.27 mm) के सापेक्ष होते हैं।
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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