Archived posting to the Leica Users Group, 1998/04/19
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Michael, The two notches on the rangefinder field rectangle do not change in size under any circumstances. Not when you change lenses, not when you change f-stops, not when you change focus. These two notches (as others have pointed out) are used to represent the amount the focus can change from perfect focus and still provide adequate sharpness. If you have a 50mm lens mounted and are using an f-stop of 5.6 you can then check that the focus is acceptable if the superimposed images in the viewfinder are within the width of the smaller notch. The same thing applies to f16 and the larger notch. You can also use this feature with f-stops within the range 5.6-16. As an example, if you have set your lens to f8 and the width between the two superimposed images is slightly greater in size than the small notch (or less) than your focus is probably acceptable. I've seldom, if ever used this feature in more than 30 years. It's much easier to simply set the hyperfocal distance on the lens using the DOF scale and then shoot like a P&S camera. I generally use hyperfocal distance when exposing from moving trains or in other similar situations. Bud Cook - -----Original Message----- From: Michael Garmisa <kilemall@shell.excelsior.net> To: leica-users@mejac.palo-alto.ca.us <leica-users@mejac.palo-alto.ca.us> Date: Saturday, April 18, 1998 10:44 PM Subject: [Leica] DOF indicator >dont know how usefull the DOF indicator is on the M3, maybe i just dont know >how to use it but it just seems like the same images in the notches and they >dont change when a vary the aperture. Think maybe ill stick with the slower >method of using the scale on the lense. > >+-----------------------------------------------------------------------+ >|kilemall@shell.excelsior.net http://shell.excelsior.net/~kilemall/| >| PGP key at: http://shell.excelsior.net/~kilemall/kilemall.asc | >|18-Apr-98 11:38pm up 10:08, 2 users, load average: 1.44, 1.10, 1.03 >+-----------------------------------------------------------------------+ >