What happens to angle of view when using a medium-format lens on a full-frame DSLR?
Asked 7/24/2013
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If I mount a medium-format lens on a full-frame DSLR using a tilt/shift adapter, how does the image compare to using the same lens on a medium-format camera? For example, with an 80mm medium-format lens: will both cameras have the same magnification and angle of view, or will the full-frame DSLR show a narrower view because its sensor is smaller? Do I need to use shift on the adapter to match the medium-format framing, or is the DSLR simply cropping the lens’s image circle?
Originally by Photography Stack Exchange contributor. Source · Licensed CC BY-SA 4.0
Photography Stack Exchange contributor
13y ago
2 Answers
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would I get the same magnification and angle of view from both
No. Your 80mm lens will stay 80mm thus the angle of view is smaller on your 35mm full frame DSLR.
would I have to shift with the adapter on the DSLR to get the same result
No. You can shift but you don't have to.
it won't be possible to get the same image section with the same magnification?
I don't get that question, please reword it. If you want a 50mm experience on your DSLR you can pick a 50mm Medium Format lens.
Originally by user7718. Source · Licensed CC BY-SA 4.0
user7718
13y ago
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Generated from our catalog & community — verify before relying on it.
The lens’s focal length does not change: an 80mm lens remains an 80mm lens on either camera. What changes is how much of the lens’s image circle the sensor or film captures.
A medium-format camera records a larger portion of that image circle, so it gives a wider angle of view. A full-frame DSLR records only the central part, so the angle of view is narrower—effectively like a crop compared with medium format.
So:
- Magnification from the lens itself is unchanged.
- Angle of view is not the same between the two cameras.
- You do not need to shift the adapter just to use the lens.
- Shifting does not restore the larger medium-format frame; it only moves which part of the oversized image circle the DSLR captures.
In practice, the DSLR is cropping the medium-format lens’s image. If you want a wider field of view on the DSLR, you would need a shorter focal length lens, not just shift.
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