Here is the specs of my lens, and cam is 350D. I need to calculate the

diagonal distance of the smallest box (W/L = 3/2) which can exactly fit

into the frame. Is this formula correct?

D = 2 * (220cm * tan(6.2/2)) / 1.6 = 14.89cm.

http://www.sigmaphoto.com/lenses/len...75&navigator=3

Angle of View 18.2 - 6.2 degrees

Minimum Focusing Distance 200- 220cm

Maximum Magnification 1:5.3

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