jbl Posted August 6, 2015 Share #1 Â Posted August 6, 2015 Advertisement (gone after registration) On the f/1 (and f/1.2) Noctilux, there's this particular signature swirl in OOF areas around the center of the frame. What's the optical phenomenon the causes that? Is it an astigmatism? Â Thanks, mostly just curious. Link to post Share on other sites More sharing options...
Advertisement Posted August 6, 2015 Posted August 6, 2015 Hi jbl, Take a look here What causes the swirl on a noctilux?. I'm sure you'll find what you were looking for!
pico Posted August 6, 2015 Share #2 Â Posted August 6, 2015 I didn't know it had swirly bokeh. Spherical aberation is the usual factor. It shows in a few of my non-Leica lenses. . Link to post Share on other sites More sharing options...
jaapv Posted August 6, 2015 Share #3 Â Posted August 6, 2015 Summarit 50/1.5 is notorious for this. Link to post Share on other sites More sharing options...
hiepphotog Posted August 6, 2015 Share #4 Â Posted August 6, 2015 On the f/1 (and f/1.2) Noctilux, there's this particular signature swirl in OOF areas around the center of the frame. What's the optical phenomenon the causes that? Is it an astigmatism? Â Thanks, mostly just curious. Â Field curvature and mechanical vignette associated with the restricted exit opening. Link to post Share on other sites More sharing options...
Peter Branch Posted August 7, 2015 Share #5 Â Posted August 7, 2015 Summarit 50/1.5 is notorious for this. Â Agreed. Link to post Share on other sites More sharing options...
fiftyonepointsix Posted August 7, 2015 Share #6  Posted August 7, 2015 Symmetric Football shaped "swirlies" are usually produced by astigmatism, more typical of double-Gauss designs that are highly corrected for flatness of field. Link to post Share on other sites More sharing options...
paulsydaus Posted August 10, 2015 Share #7 Â Posted August 10, 2015 Advertisement (gone after registration) I don't know but it can be used to good effect by placing the subject front and centre! Â On the f/1 (and f/1.2) Noctilux, there's this particular signature swirl in OOF areas around the center of the frame. What's the optical phenomenon the causes that? Is it an astigmatism? Â Thanks, mostly just curious. Link to post Share on other sites More sharing options...
Stealth3kpl Posted December 30, 2015 Share #8  Posted December 30, 2015 This is Tilly, the family's new Labrador. Noctilux f1 (currently at Leica being serviced). It shows the background swirl and the light drop off to the edges although I've probably exaggerated the light fall off. Pete  000010-2b by Pete, on Flickr Link to post Share on other sites More sharing options...
Sam Posted December 30, 2015 Share #9  Posted December 30, 2015 This is Tilly, the family's new Labrador. Noctilux f1 (currently at Leica being serviced). It shows the background swirl and the light drop off to the edges although I've probably exaggerated the light fall off. Pete  000010-2b by Pete, on Flickr  A lovely photo, Pete. Link to post Share on other sites More sharing options...
gpwhite Posted December 31, 2015 Share #10 Â Posted December 31, 2015 Not an affirmed Noctiluxer, but I must say the f/1 images are far more pleasing to my taste than the edgy nature of the f/0.95. Tilly's family photo shows this well! Link to post Share on other sites More sharing options...
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