Keith (M) Posted November 5, 2011 Share #1 Posted November 5, 2011 Advertisement (gone after registration) Forgive my ignorance, but I am curious about the split-eyepiece seen on a IIIc. How does this function? Link to post Share on other sites More sharing options...
Advertisement Posted November 5, 2011 Posted November 5, 2011 Hi Keith (M), Take a look here Leica IIIc Eyepiece Question. I'm sure you'll find what you were looking for!
StephenPatterson Posted November 5, 2011 Share #2 Posted November 5, 2011 As viewed from behind, the left window is used to focus the lens with the rangefinder (I believe 1.5x magnification). The window on the right is the viewfinder used to compose the shot, with a 50mm lens. These functions were not combined into a single eyepiece by Leica until the M3. Stephen Link to post Share on other sites More sharing options...
luigi bertolotti Posted November 5, 2011 Share #3 Posted November 5, 2011 ... and in the older models, before IIIc, the two eyepieces were even more separated... [ATTACH]286352[/ATTACH] Link to post Share on other sites More sharing options...
madNbad Posted November 6, 2011 Share #4 Posted November 6, 2011 The lever under the rewind knob is a diopter adjustment. When you are looking through the left window, moving the lever will help compensate for any decreased acuity in vision. Link to post Share on other sites More sharing options...
lars_bergquist Posted November 6, 2011 Share #5 Posted November 6, 2011 Originally, the rangefinder had unit magnification (the viewfinder was 0.5x). With the Leica III, the rangefinder became a small 1.5x telescope, so it had to be possible to focus it for near and far. Note that the focusing lever is marked with a ∞ for infinity – not in dioptries! The viewfinder has no correction, so people with real vision trouble had to use correction lenses which Leitz supplied in pairs for both eyepieces. The old man from the Age of the Naked Eye Link to post Share on other sites More sharing options...
lars_bergquist Posted November 6, 2011 Share #6 Posted November 6, 2011 ... and in the older models, before IIIc, the two eyepieces were even more separated... Luigi, the IIIb (1938) was the first model with the double eyepiece! The old man with the double vision Link to post Share on other sites More sharing options...
madNbad Posted November 6, 2011 Share #7 Posted November 6, 2011 Advertisement (gone after registration) Thanks for the clarification. All this time I've been using it to help my crummy eyesight. Link to post Share on other sites More sharing options...
luigi bertolotti Posted November 6, 2011 Share #8 Posted November 6, 2011 Luigi, the IIIb (1938) was the first model with the double eyepiece! The old man with the double vision ... right... Link to post Share on other sites More sharing options...
Keith (M) Posted November 6, 2011 Author Share #9 Posted November 6, 2011 As viewed from behind, the left window is used to focus the lens with the rangefinder (I believe 1.5x magnification). The window on the right is the viewfinder used to compose the shot, with a 50mm lens. These functions were not combined into a single eyepiece by Leica until the M3. Stephen Thanks for all of the replies. Very interesting. How difficult is it for a spectacles-wearer to focus/compose using these two very adjacent windows on a IIIc? Link to post Share on other sites More sharing options...
andybarton Posted November 6, 2011 Share #10 Posted November 6, 2011 I don't have a problem. I was using a IIIf this morning. Bear in mind that there are no frame lines in the viewfinder but the viewfinder windows are very small when compared to an M Link to post Share on other sites More sharing options...
philipus Posted November 15, 2011 Share #11 Posted November 15, 2011 Thanks for all of the replies. Very interesting. How difficult is it for a spectacles-wearer to focus/compose using these two very adjacent windows on a IIIc? I have no problems focusing my II when I wear glasses. In dim light, however, the small hole of the RF makes it a bit difficult to focus. However, framing in dim light is easier because of the lack of magnification in the VF. But this shouldn't deter you from getting a Barnack. They're incredibly nice to use. Link to post Share on other sites More sharing options...
St.Valentine Posted November 15, 2011 Share #12 Posted November 15, 2011 Same here. It´s a camera from another age but fun nevertheless. I even prefer my IIa over my IIIf and IIIg! Frank Link to post Share on other sites More sharing options...
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