ersatz wrote:
Semantics aside, what is the angle of view when using an 80mm MF lens on a FF DSLR? Would the resultant framing be equivalent to using a Canon 50mm EF mount lens?
The answer is in this thread, probably multiple times. The answer is no. The focal length stays the same regardless of the size of the sensor. A 80mm lens is equivalent to a 50mm in angle of view ONLY on its NATIVE FORMAT, because the recording medium is larger.
The image circle of the MF lens needs to be bigger in order to project a large enough image on the medium format film/sensor, which is why those lenses are more bulky than 135 format (FF) lenses. A FF sensor only captures (crops) the central portion of a MF lens, which is why a MF lens doesn\'t have a wider angle of view than a FF lens.
Edit: H.Lux is incorrect. Focal length is not related to the size of the recording medium. Crop factor influences the field of view, not the focal length.
ersatz wrote:
Semantics aside, what is the angle of view when using an 80mm MF lens on a FF DSLR? Would the resultant framing be equivalent to using a Canon 50mm EF mount lens?
The answer is in this thread, probably multiple times. The answer is no. The focal length stays the same regardless of the size of the sensor. A 80mm lens is equivalent to a 50mm in angle of view ONLY on its NATIVE FORMAT, because the recording medium is larger.
The image circle of the MF lens needs to be bigger in order to project a large enough image on the medium format film/sensor, which is why those lenses are more bulky than 135 format (FF) lenses. A FF sensor only captures (crops) the central portion of a MF lens, which is why a MF lens doesn\'t have a wider angle of view than a FF lens.
Feb 06, 2011 at 02:38 PM
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