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focal range of 70-300mm lens when mounted film changes in a digital SLR?
I have a Nikon / Nikkor 70-300 mm telephoto film zoom. Does this focal range change if I attach the same lens of a nikon digital slr camera? What is the conversion formula?
The focal length of a 70-300mm film does not "change" at all, just crops (leaves out a part of what you're photographing) as if it were a 105-450mm lens, to know how a camera lens of a film will react in Nikon digital (DSLR), multiply 1.5×70 and 1.5×300 multiply and you get 105 and 450, respectively. Let me try to explain that. If you have a 50 mm lens on a digital camera would be set aside part of the scene as if using a 75mm lens and the sensor is smaller than the plane (the flat), where the film is, ie, the target film is aimed at an altar that is 1.5 times larger. Therefore, to determine how the effect of culture is, multiply the focal length of the lens of 1.5 and the same with any lens designed for film photography. Hope this helps. Although the lens mount is the same, that is why the DX lens (for digital cameras) have an effect vingnetting around the image if used in film cameras. DX lenses are designed exclusively for digital cameras.
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