LeicaFoReVer
Addicted to Rangefinders
I bought m-rokkor 28mm through ebay for 320$ The seller was saying it is completely clean from white dots.
However after I got the lens I see some very fine dots (actually it looks like haze or sanded glass, especially under direct-strong light) along the inner spherical element. It is not on the front element. Please see the photos and help me to identify it...
However after I got the lens I see some very fine dots (actually it looks like haze or sanded glass, especially under direct-strong light) along the inner spherical element. It is not on the front element. Please see the photos and help me to identify it...
raid
Dad Photographer
The 28mm Rokkor is famous for such white dots.
They are not affecting the images,and they are costly to remove.
They are not affecting the images,and they are costly to remove.
LeicaFoReVer
Addicted to Rangefinders
Hi Raid, but do you think those are the famous white dots? because I heard it is mostly on the front element not the inner one as in my case.
mac_wt
Cameras are like bunnies
The white dots in my M-Rokkor 28 are a lot more noticeable than this. They are very obvious white spots in an almost perfect circle around the glass. I don't see anything that looks like them in this lens. Regards, Wim
LeicaFoReVer
Addicted to Rangefinders
Yes that is why I am posting this. It does not look like the famous dot problem but it is in the inner spherical element like very fine dots...Is it haze than? or the epoxy between the glass elements gone bad or something?
LeicaFoReVer
Addicted to Rangefinders
I have some close-up images. It looks it is intense!
ferider
Veteran
These are not the commonly referred to white dots. Could just be dirt/dust. You got a nice lens there, stop worrying ! Or, if it really bothers you, send it in for CLA.
(and great macro shots, BTW).
(and great macro shots, BTW).
Rayt
Nonplayer Character
Mine is full of white dots but the price was right and the pictures seem normal.
LeicaFoReVer
Addicted to Rangefinders
it is to homogenously distributed to be dust. It looks like micro-bubles.
By the way the pics are from the binocular microscope at my work
I think I use 20x mag.
By the way the pics are from the binocular microscope at my work
I think I use 20x mag.
Rayt
Nonplayer Character
By the way the pics are from the binocular microscope at my work
You are very brave. I won't even shine a flash light into my Leica lenses anymore. The first time I almost had a heart attack seeing all that dust inside.
LeicaFoReVer
Addicted to Rangefinders
I think you are right
It is so discouraging and bad to see all those you barely see with naked eye But those things are visible if you look through the lens towards a light source.
Palaeoboy
Joel Matherson
Its not the white spot problem. The white spots in most cases limit themselves to the black painted non optical edge of the front element. It does in some occasions get really bad that the white crystals break off and move onto the rear of the front element but they are much larger by this stage. They can etch into the coating and leave marks when the lens is cleaned but the ones I see here are too fine and even to be this either. Its hard to be 100% sure based on photos but I must agree with Ferider its looks like fine dust particles to me. Remember that only the finest particles get sucked into a lens so it tends to be fairly even in distribution and size, thats my guess anyways.
Additional Note - In another thread you mention they are visible when you shine a bright light into the lens, that makes me even more so think its dust. I agree with another post in this thread a brave man shines a light in an old lens. I have seen fair quantities of dust in new lenses when I shine a light in them. I think your lens for its age is fine.
Additional Note - In another thread you mention they are visible when you shine a bright light into the lens, that makes me even more so think its dust. I agree with another post in this thread a brave man shines a light in an old lens. I have seen fair quantities of dust in new lenses when I shine a light in them. I think your lens for its age is fine.
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LeicaFoReVer
Addicted to Rangefinders
thank you for your comment Paleoboy.
raid
Dad Photographer
I may be wrong about the white dots in your lens. Get a CLA for the lens and see if the lens comes back shiny clean.
LeicaFoReVer
Addicted to Rangefinders
Raid, is the CLA of this lens easy? I heard that as some of the glasses or elements are attached to the barrel, not screwed, it is difficult to CLA. Is that right?
kermaier
Well-known
It's hard for me to tell from the pix. Could be dust. I have this lens, which I bought with an even distribution of what looked like fine bubbles all over the inner surface of the front element:
I found that it caused flare in sunlight, so I wanted to have it cleaned. Jon Van Stelten at FocalPoint told me it was due to moisture trapped in the lens interacting with metals in the glass and causing oxidation bubbles on the coating. He cleaned it up for me, and it's great now. It wasn't cheap, as the front element is very hard to remove on this lens.
Ari
I found that it caused flare in sunlight, so I wanted to have it cleaned. Jon Van Stelten at FocalPoint told me it was due to moisture trapped in the lens interacting with metals in the glass and causing oxidation bubbles on the coating. He cleaned it up for me, and it's great now. It wasn't cheap, as the front element is very hard to remove on this lens.
Ari
alfcnka
Member
I suggest you either send it for CLA or start shooting picture with it. Let the pictures decide, don't let the white spots bother you. If the pictures turns out nice just use it like a normal lense.