why we are use at the time of focus distance calculation we take the sign + for convex and – for concave.who discoved first and why that take +,- ?

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Saurabh Koranglekar · Answer

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why we are use at the time of focus distance calculation we take the sign + for convex and – for concave.who discoved first and why that take +,- ?

why we are use at the time of focus distance calculation we take the sign + for convex and – for concave.who discoved first and why that take +,- ?

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why we are use at the time of focus distance calculation we take the sign + for convex and – for concave.who discoved first and why that take +,- ?

why we are use at the time of focus distance calculation we take the sign + for convex and – for concave.who discoved first and why that take +,- ?

1 Answers

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