Alberti Posted October 8, 2021 Share #1  Posted October 8, 2021 Advertisement (gone after registration) I bought a Summilux 50mm v2. Great lens. Sharp. At F2 like my Summicron V5. And soft. Like a vintage 1.4 or 1.5 should be. A great mix. My wife says: it has 3D. I attached an Oufro to take some close-up shots. Then I saw some spots in the bokeh balls I never saw before in normal conditions; because of the subdued background it might be more visible now. Are these cleaning artefacts? It reminds me of looking through microscopes to two glasses that have air bubbles in between. Well, at least it is better than several recent lenses that have severe onion rings . Those are hard to swallow. 😂 Welcome, dear visitor! As registered member you'd see an image here… Simply register for free here – We are always happy to welcome new members!   Quote Link to post Share on other sites Simply register for free here – We are always happy to welcome new members!   ' data-webShareUrl='https://www.l-camera-forum.com/topic/325190-spots-in-the-bokeh-balls/?do=findComment&comment=4288588'>More sharing options...
Advertisement Posted October 8, 2021 Posted October 8, 2021 Hi Alberti, Take a look here Spots in the Bokeh balls ?. I'm sure you'll find what you were looking for!
pippy Posted October 8, 2021 Share #2 Â Posted October 8, 2021 (edited) Hi Alberti. Not sure if it's for exactly the same reason but I experienced / noticed something very similar in one image I snapped a couple of weeks ago where strange dots were apparent. You might want to have a look through this thread I started when I wished to receive some suggestions as to the cause. Post #14 shows the 'dots' quite clearly; https://www.l-camera-forum.com/topic/324620-what-on-earth-is-going-on-here/ Adan's post (#28, page 2) - where he raises the notion of Airy Discs - does seem to explain the root cause. Philip. Edited October 8, 2021 by pippy Quote Link to post Share on other sites More sharing options...
Alberti Posted October 8, 2021 Author Share #3  Posted October 8, 2021 Clarifying thread, thanks:  the dust is on the surfaces closest to the aperture while diffraction is normally depicted as light passing through a narrow slit or pinhole, light can also diffract around the edges of a solid object. It is the edges that bend/diffract light around a solid particle. Well so much for my recent eBay purchase "cleaned and serviced" Summilux. Dust on the inner surface at the aperture blades. Can I call the seller? - You know, the focussing is so good (on par with my Wetzlar serviced Cron V5) that I don't want a service tech fumbling the focus up. And yes, I have it repeatable in my Canon 50mm 1.4 LTM too, but very little (thanks to good service @ Will van Maanen): the spot is there all the time & looks like the example of the back element in your thread. I'll have a look. Welcome, dear visitor! As registered member you'd see an image here… Simply register for free here – We are always happy to welcome new members! Canon 50mm 1.4 LTM taken by my twelve year nephew . . . albert  3 Quote Link to post Share on other sites Simply register for free here – We are always happy to welcome new members! Canon 50mm 1.4 LTM taken by my twelve year nephew . . . albert  ' data-webShareUrl='https://www.l-camera-forum.com/topic/325190-spots-in-the-bokeh-balls/?do=findComment&comment=4288632'>More sharing options...
pippy Posted October 8, 2021 Share #4 Â Posted October 8, 2021 (edited) 2 hours ago, Alberti said: Well so much for my recent eBay purchase "cleaned and serviced" Summilux. Dust on the inner surface at the aperture blades. Can I call the seller?......- You know, the focussing is so good (on par with my Wetzlar serviced Cron V5) that I don't want a service tech fumbling the focus up.... To be fair to the seller if it is the Airy Disks phenomenon then, according to the link in Andy's post, they can only be seen with a microscope(!) so I don't think, realistically, that the seller could be blamed for not having seen them. I suppose that what you do next will depend on several factors; 1. How often are these artifacts likely to occur? How often you shoot photographs similar to the ones posted here? 2. How annoying do you find them? Can you live with them and simply accept that 'that's just how it is' or do they ruin the photograph(s) for you? 3. If they are so very small will a thorough CLA be able to get rid of them completely? If not then......see point 2. As it's a v2 Summilux it must be at least 30 years old - and could even be 60 - so, if it were me in your position, I'd just roll with it and accept that an old lens might have one or two 'foibles'. If I liked everything else about it (and I'm guessing that you do) then that would settle things and I wouldn't give the matter a second thought. That's how I now consider my Summarit mentioned in the other thread; it's a nigh-on 70 year old lens with a quirky nature. BTW; nice picture by your nephew! Philip. Edited October 8, 2021 by pippy 1 Quote Link to post Share on other sites More sharing options...
Alberti Posted October 9, 2021 Author Share #5  Posted October 9, 2021 It is all quite right: using the OUFRO 'magnifies' the issue. With out it, I never saw this. And secondly, mostly the 'balls' are 'over-exposed', that is, any of these newton-look-alike rings disappear. My example is with a dimly lit light source in the background. Then it is more visible. Indeed, last batch of production; @ any handling can create problems elsewhere . . Quote Link to post Share on other sites More sharing options...
Marac Posted October 9, 2021 Share #6 Â Posted October 9, 2021 Having spots in your balls is never a good start to the day 1 Quote Link to post Share on other sites More sharing options...
Herr Barnack Posted October 9, 2021 Share #7  Posted October 9, 2021 (edited) Advertisement (gone after registration) 2 hours ago, Marac said: Having spots in your balls is never a good start to the day @Alberti This sounds serious. You might want to consult a urologist. Edited October 9, 2021 by Herr Barnack 2 Quote Link to post Share on other sites More sharing options...
Gobert Posted October 12, 2021 Share #8  Posted October 12, 2021 On 10/9/2021 at 1:48 PM, Marac said: Having spots in your balls is never a good start to the day Would you so kind to explain this to me in further detail? I don’t understand it. May be you can add some pictures for clarification. 1 Quote Link to post Share on other sites More sharing options...
Marac Posted October 12, 2021 Share #9  Posted October 12, 2021 2 hours ago, Gobert said: Would you so kind to explain this to me in further detail? I don’t understand it. May be you can add some pictures for clarification. You would have to ask the OP I'm afraid as my balls are spotless Quote Link to post Share on other sites More sharing options...
farnz Posted October 12, 2021 Share #10  Posted October 12, 2021 6 hours ago, Gobert said: Would you so kind to explain this to me in further detail? I don’t understand it. Gobert, it's meant as a joke. People whose first language is not English might not know that "balls" is slang for testicles.  Pete. Quote Link to post Share on other sites More sharing options...
Gobert Posted October 13, 2021 Share #11  Posted October 13, 2021 7 hours ago, farnz said: Gobert, it's meant as a joke. People whose first language is not English might not know that "balls" is slang for testicles.  Pete. Pete,  I made a joke as well. Quote Link to post Share on other sites More sharing options...
farnz Posted October 13, 2021 Share #12  Posted October 13, 2021 1 hour ago, Gobert said: Pete,  I made a joke as well. I'm afraid it was too subtle for me at the time and I took your comment to be genuine. Pete. Quote Link to post Share on other sites More sharing options...
Alberti Posted October 13, 2021 Author Share #13  Posted October 13, 2021 (edited) All well understood. I appreciate though the sensitivity of Pete for the larger audience. He has the balls to give his opinion. And then - - seriously I might make a small investigation into the matter, but it is hard to recreate the circumstances, - that bottle, it's now a prop. - the long room with its lighting where we were for diner, is 300 km from here. - And I would have to compare several lenses how they behave. Anyway, the posted pictures were with using OUFRO 10mm if I am right. It will it magnify the bokeh. Here one without the macro ring, cropped : Welcome, dear visitor! As registered member you'd see an image here… Simply register for free here – We are always happy to welcome new members! This has some small spots too. But not nasty. But really, I'll be the only one to see it. And come to think of it, these are old lenses as Pippy says in his thread, so accept it. Just think it is nice to have the moon with me. Edited October 13, 2021 by Alberti 1 2 Quote Link to post Share on other sites Simply register for free here – We are always happy to welcome new members! This has some small spots too. But not nasty. But really, I'll be the only one to see it. And come to think of it, these are old lenses as Pippy says in his thread, so accept it. Just think it is nice to have the moon with me. ' data-webShareUrl='https://www.l-camera-forum.com/topic/325190-spots-in-the-bokeh-balls/?do=findComment&comment=4291592'>More sharing options...
Alberti Posted October 13, 2021 Author Share #14  Posted October 13, 2021 and I'll really be ashamed if I find out the really dirty lens is a Helios-103 on an Amadeo adapter. Where is the hole I can then put my head in? 😱 2 Quote Link to post Share on other sites More sharing options...
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