Archived posting to the Leica Users Group, 2009/01/10
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Thanks for the diagnostics... I'll give them a try... > Date: Fri, 9 Jan 2009 22:24:23 -0600 > From: amr3@uwm.edu > To: lug@leica-users.org > Subject: RE: [Leica] Thanks... /Checking Camera > > On Fri, 9 Jan 2009 Gary Dalton <grdalton@hotmail.com> wrote: > > >Before all of that. I need to know if the M2 still works. This particular > >"hammer" hasn't been used in 20 years, and the "hammerer" (me) >has never > >used this particular hammer before... (or shall we call it a "hammera" at > >this point?) > > >So, to start with, I'm going to shoot with each of my five lenses at > >different f-stops and speeds. I'll record that data and compare it with > >>the prints to see what I've got... > > >How's that sound for a starting point? > ================================================================================================= > I think you might worry about the camera speeds more than the lenses not > working. I would say, use one lens to conduct a shutter > test. Find a non-varying subject and lighting level that allows you to > use speeds from, say, 1/1000 at f/2 to 1/15 at f/16. Use each combination > and see if the resulting densities appear pretty much the same. (At f/2 > there might be some vignetting, but the center > should be close to the other pairings if all speeds are good). If you have > a CRT monitor,put on a blank screen, take off the back door and lens, hold > the camera vertically close in front of the TV, and, starting at 1/60, > fire the shutter. At 1/60, you should see almost a full frame image of > the screen. As you change to each faster speed, the slit should halve the > image, so at 1/125 there should be only a half frame, etc. Do this > multiple times for each speed, to catch the bright patch in the center and > average the results. The 1/1000 > speed frequently goes off spec when the first curtain slows up, so you > might not see much, or anything, which means it is getting > sticky. For slower settings, (no TV for this) under room lighting, look > at the camera from the front as you fire the shutter. If the first > curtain is getting lethargic, you can actually see it failing to clear the > film aperture before the second curtain comes across. If the gear train > hesitates, or doesn't reset until you start to wind the lever, you've got > trouble. > You should check for pinholes in the shutter curtains too, just in case. > > > Alan > > Alan Magayne-Roshak, Senior Photographer > UPAA POY 1978 > University Information Technology Services > University of Wisconsin-Milwaukee > http://gallery.leica-users.org/v/Alan+Magayne-Roshak/ > > > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information _________________________________________________________________ Windows Live?: Keep your life in sync. http://windowslive.com/howitworks?ocid=TXT_TAGLM_WL_t1_allup_howitworks_012009