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Take a look at the lens basics page, and let me know if the section on magnification answers your questions.
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Salil Sahani wrote:Ok So to Get 1:1 Magnification I Have to Be at the Minimum Focusing distance of 105mm VR from the Subject Right ?
that is correct. To test this, get a nice metric ruler and shoot it. You should be able to get about 24 mm in the frame. If you get that you are at 1:1 (since the sensor is 24.6 mm across).
Bill Van Antwerp Canon/Nauticam/Subal/Inon Lots of glass
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