bencoyote Posted January 16, 2015 Share #1  Posted January 16, 2015 Advertisement (gone after registration) When you look at http://us.leica-camera.com/content/download/120636/1219177/version/9/file/Technical-Data-Leica-APO-Vario-Elmar-T+55-135+ASPH._EN.pdf and http://us.leica-camera.com/content/download/120633/1219138/version/9/file/Technical-Data-Leica-Super-Vario-Elmar-T+11-23+ASPH._EN.pdf  They have MTF charts for what I would expect are impossible focal distance and aperture combinations. For example, I would expect 55mm and f/3.5 but it is surprising that they have 85mm and 135mm f/3.5 MTF chart. To me this would indicate a 55-135mm constant aperture f/3.5 rather than a f/3.5-4.5. A similar thing is true for the 11-23mm lens.  Doing the math a 135 at f/4.5 is 30mm while a f/3.5 is 38.5mm. With a lens barrel diameter of 68mm, a 38.5mm aperture doesn't sound mechanically impossible. 23mm at f/4.5 is 5.1mm while f/3.5 is 6.6mm.  The 18-56mm's data sheet collection of MTF charts does match the lens's maximum aperture.  Is this likely an error on Leica's part or is it more likely that the lens will have a wider aperture when zoomed in than originally announced? If it was just one number, I would totally assume it was just an error but the fact that it is a whole graph different than other graphs and hopefully backed by measurements makes me curious.  Has anyone seen these lenses yet? Link to post Share on other sites More sharing options...
Advertisement Posted January 16, 2015 Posted January 16, 2015 Hi bencoyote, Take a look here New lens data sheets and max aperture. I'm sure you'll find what you were looking for!
Carbon111 Posted January 16, 2015 Share #2 Â Posted January 16, 2015 That 55-135 looks like a stunner! Â ...though I also wonder about the f/3.5 chart for the 135mm FL. O.o Link to post Share on other sites More sharing options...
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