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06/11/2008 07:14:33 PM · #1 |
Is the angle of view the same on a wide angle lens when fitted on an APS-C camera as oposed to on a full frame.
ie, the sigma 12-24mm would have the 35mm equivalent of 19-38mm on an APS-C sensor, would the 122 - 84.1 degrees angle of view be the same on both? |
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06/11/2008 08:07:25 PM · #2 |
I don't know the answer to that specific question, but here's a related discussion where the author asks if the DOF is the same on both type of sensors (all else remaining the same, e.g. aperture, focal length, etc.)
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06/11/2008 08:11:24 PM · #3 |
Originally posted by bobonacus:
ie, the sigma 12-24mm would have the 35mm equivalent of 19-38mm on an APS-C sensor, would the 122 - 84.1 degrees angle of view be the same on both? |
I seriously doubt it. Since the projected image is cropped, I would expect the angle of view to match a 19-38mm equivalent lens. |
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06/11/2008 08:14:39 PM · #4 |
| The angle of view will be the same for 12mm on APS-C as it is for 19mm on a 35mm sensor, and that is assuming the typical Canon 1.6 crop factor. Likewise, the AoVs are equivalent for 24mm on APS-C and 38mm on a 35mm frame. |
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06/11/2008 09:54:05 PM · #5 |
It's a pretty simple geometry problem.
I've calculated it before for the Sigma 12mm lens on an APS-C camera and, if I recall correctly, the Sigma 12-24 has about a 90deg FOV on such a camera, I'll see if I can find where I left my calculation sheet.
ETA: This is where I posted it: Link
But the short answer is 97.3 degrees on a Canon APS-C camera
Message edited by author 2008-06-11 22:08:41.
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06/12/2008 03:04:40 AM · #6 |
| Cool, thanks for your replies :) |
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