Lindolfi Posted April 15, 2012 Share #1 Posted April 15, 2012 Advertisement (gone after registration) The hunt for faster and faster lenses continues! Today I found a lens with an aperture of f/0.72. It has a focal length of 130 mm and here you can see it mounted in front of my M9: The spherical and chromatic aberrations are considerable, but the light gathering capacity of this lens is fantastic. Here you can see an image taken with this lens of my 8x10 inch Gandolfi next to an image taken with a Summilux 50/1.4 asph. from the same location but cropped to match the viewangle. Link to post Share on other sites More sharing options...
Advertisement Posted April 15, 2012 Posted April 15, 2012 Hi Lindolfi, Take a look here f/0.72. I'm sure you'll find what you were looking for!
Dan States Posted April 15, 2012 Share #2 Posted April 15, 2012 It needs a bigger focus grip to be really useful for street photography. Link to post Share on other sites More sharing options...
Messsucherkamera Posted April 15, 2012 Share #3 Posted April 15, 2012 [quote=Lindolfi;2039 Here you can see an image taken with this lens of my 8x10 inch Gandolfi next to an image taken with a Summilux 50/1.4 asph. from the same location but cropped to match the viewangle. Given the image quality it produces, I'm not sure what the application of this lens would be. Who makes this lens? Link to post Share on other sites More sharing options...
MarkP Posted April 15, 2012 Share #4 Posted April 15, 2012 Given the image quality it produces, I'm not sure what the application of this lens would be. For those who really love that Leica glow Link to post Share on other sites More sharing options...
pop Posted April 15, 2012 Share #5 Posted April 15, 2012 I might be mistaken, but it seems to me that the lens shows a fair bit of spherical aberration. This is said to be the main source of bokeh, however, of which there is a fair deal. Link to post Share on other sites More sharing options...
Lindolfi Posted April 15, 2012 Author Share #6 Posted April 15, 2012 Yes Dan, that would be nice. The lens weighs 8 kilogram, so you also need a set of training sessions at the local fitness center. Messucherkamera, the resolution is so bad that the lens can only be used for arty purposes. The lens was made about a century ago in China and its main purpose is to tell the future. Understandable that the image it produces is so vague! MarkP: yes, lots of glow here. Philip, I think you are right: even the in focus part has bokeh. Link to post Share on other sites More sharing options...
MarkP Posted April 15, 2012 Share #7 Posted April 15, 2012 Advertisement (gone after registration) I might be mistaken, but it seems to me that the lens shows a fair bit of spherical aberration. This is said to be the main source of bokeh, however, of which there is a fair deal. I think the lens is a spherical aberration. Link to post Share on other sites More sharing options...
Peter H Posted April 15, 2012 Share #8 Posted April 15, 2012 I'm waiting for the silver-chrome version. Link to post Share on other sites More sharing options...
MarkP Posted April 15, 2012 Share #9 Posted April 15, 2012 The lens was made about a century ago in China..) Juist shows you get your money's worth buying cheap mass-produced Chinese products. Buyers of the new 0.95/50 Hyperprime beware! Link to post Share on other sites More sharing options...
pgk Posted April 15, 2012 Share #10 Posted April 15, 2012 The lens was made about a century ago in China and its main purpose is to tell the future. Hmmm. I think that you ought to sell the Gandolfi before too much longer in that case;). Link to post Share on other sites More sharing options...
Ecar Posted April 15, 2012 Share #11 Posted April 15, 2012 I assume you use an appropriate Heavystar hood? Link to post Share on other sites More sharing options...
peggers Posted April 16, 2012 Share #12 Posted April 16, 2012 Wow, it can see into the future. Does this mean it sucks rays faster than the speed of light. Not sure what this means in terms of shutter lag requirements. Link to post Share on other sites More sharing options...
IkarusJohn Posted April 16, 2012 Share #13 Posted April 16, 2012 It's a bit soft wide open, isn't it? Link to post Share on other sites More sharing options...
Paul J Posted April 16, 2012 Share #14 Posted April 16, 2012 I would like to see a tear down of the lens. Link to post Share on other sites More sharing options...
farnz Posted April 16, 2012 Share #15 Posted April 16, 2012 Can it be 6-bit coded? Pete. Link to post Share on other sites More sharing options...
masjah Posted April 17, 2012 Share #16 Posted April 17, 2012 Just don't leave it out in the sun with a cloth shuttered M. (Actually it looks as if it would burn a hole in any sort of shutter in such circumstances.) Link to post Share on other sites More sharing options...
Lindolfi Posted April 19, 2012 Author Share #17 Posted April 19, 2012 I would like to see a tear down of the lens. Well, by playing with the refractive index in a ray trace model I wrote, and obscuring parts of the entrance of the ball (central aperture or central obstruction) it appears that it is normal crown glass. The peripheral rays focus close to the surface, just outside the ball, while the central rays focus at about 25 mm outside the ball. Here the ray tracing for a point source at 10 meter distance of the ball. Tracing was done for three wavelengths (lambda=[687 589 486] nm) to show the chromatic aberration. Link to post Share on other sites More sharing options...
peggers Posted April 19, 2012 Share #18 Posted April 19, 2012 Does anyone have an mtf chart for this lens? Link to post Share on other sites More sharing options...
pgk Posted April 20, 2012 Share #19 Posted April 20, 2012 Does anyone have an mtf chart for this lens? L (should be bigger really). Link to post Share on other sites More sharing options...
Guest Posted April 20, 2012 Share #20 Posted April 20, 2012 Didn't Stanley Kubrick have three 0.72 lenses made for when he made Brian Lyndon. I seam to remember that Zeiss made them. Brian Link to post Share on other sites More sharing options...
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