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75mm APS-C vs 110mm full frame portrait comparison
Interactive side-by-side simulation at the same subject size: see how 75mm APS-C and 110mm full frame change camera distance, perspective, depth of field and background blur.
What this comparison shows
Both images show the same portrait at the same size. Both cameras stand at almost the same distance, because 75mm APS-C and 110mm full frame have a similar field of view. From closer in, 110mm full frame shows more of the room around the person. 75mm APS-C has a narrower field of view, so the background looks larger and closer and is easier to simplify.
Start at f/1.2 on the left and f/1.8 on the right. Then try f/1.8 vs f/1.8, or open both to f/1.2 and f/1.8. Match depth of field sets the right-hand aperture so the background is as blurred as on the left. The smaller APS-C sensor needs a wider aperture to reach the same background blur as full frame.
At the face framing, 75mm APS-C stands 183 cm from the subject. At f/1.2 the sharp zone runs from 181 cm to 185 cm. 110mm full frame stands 176 cm away, and at f/1.8 the sharp zone runs from 174 cm to 178 cm.
Questions
How far from the subject do you stand with 75mm APS-C and 110mm full frame?
In the face framing, 75mm APS-C stands 183 cm from the subject and 110mm full frame stands 176 cm. Both cameras stand at almost the same distance, because 75mm APS-C and 110mm full frame have a similar field of view.
Which blurs the background more, 75mm APS-C or 110mm full frame?
At the same framing, a distant background blurs in proportion to the aperture opening, focal length divided by f-number. 75mm APS-C at f/1.2 opens 62.5 mm and 110mm full frame at f/1.8 opens 61.1 mm, so both blur it about the same. Close behind the person, the focal length matters less and the f-number more.
Do 75mm APS-C and 110mm full frame give a different perspective?
Hardly. Both frame the face from almost the same distance, so perspective and background size match. What changes is how much the background blurs at a given f-number.
Related comparisons
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- 33mm APS-C vs 50mm full frame portrait comparison
- 35mm APS-C vs 50mm full frame portrait comparison
- 56mm APS-C vs 85mm full frame portrait comparison
- 90mm APS-C vs 135mm full frame portrait comparison
- 110mm medium format vs 85mm full frame portrait comparison
Also see: depth of field, bokeh, crop factor, lens compression.