Archived posting to the Leica Users Group, 1998/02/05
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Jim Brick's response: "If you stand and look through your 100mm and observe the DOF, then replace the 100mm with a 50mm and physically move up toward your subject until the frame you see through the 50, is the same as you saw it through the 100, what you see will have the same DOF." If the subject is the *same size* in the viewfinder, regardless of which lens your are using, the DOF is the same. Frank's Conclusion: Use the wider angle lens and move in on the subject. Using a fixed output ring flash at a closer distance, will throw more light ( square law) which will allow smaller F-stops, thus more DOF for the same image size. Big win for me.... Downside: the perspective will change. "Since the DOF will be the same, with any lens, for the same image size, choose the 100mm APO Macro. It's one of the most outstanding lenses ever produced." thanks Jim for the help.... I think I know which way I will lean..... Thank You Remove "ZZ" form auto reply address or please reply to address below: Frank Filippone red735i@worldnet.att.net