David H. Bebbington Jul 17, 2006 F-stop would have been a marked f4 to f5.6 (effective f-stop of course less because of the lens and tube extension). The idea of this series is to use shallow depth of field.
F-stop would have been a marked f4 to f5.6 (effective f-stop of course less because of the lens and tube extension). The idea of this series is to use shallow depth of field.