Star & Sky

Star & Sky

4.11 - 1251 ratings - Source

c59 column for questionsa#39; and-answers and the exchange qf ideas STAR aamp; SKY Magazine, Back Issue Department, ... Timothy Clark Kansas City, MO The neutral density number of a filter is a logarithmic function of the amount of light ... I have disassembled several similar motors and do not feel that it pays to repair them.

Title:Star & Sky
Publisher: - 1979


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