Pentacon oil?

[woodrim]

I suppose this is oil on the blades? Is this serious? What do you suppose this lens is worth? I'm considering. It's a 135mm zebra.

[BRunner]

Oil on blades is OK with preset lenses. But in the reflection I see huge fungus marks in coating. The fungus has been probably cleaned, but the coating of inner lenses surfaces is irreversibly suffered. In this condition and M42 mount is worth 10€ - for the mount alone....

[Attila]

On pre-set lens like this pretty normal , doesn't harm anything. It is critical on Auto lenses only. Take it you will love it. I saw best bokeh from this lens in my life.

[woodrim]

I thought those marks on lens were maybe a reflection of the oil. Is that possible or is fungus more likely?

[woodrim]

I just saw lens from a different angle and it does look like fungus. Thanks much. It's only about $35, but I don't want fungus.

[BRunner]

Oil reflections certainly not. I already cleaned lenses with fungus and if the coating is harm, it looks exactly like this.

[Attila]

[aoleg]

[woodrim]

I let it go, but I did like all those aperture blades.

[Pancolart]

I think it was mistake. Big secret regarding Pentacons (and Meyers) is that grease inside lens forms structures on inner glass elements that looks exactly like scratches. They can be cleaned completely with ease and without any remains. I've bought few lenses for nearly nothing knowing that. Just ask seller if the ugly thing is on inner side. If outside glass is undamaged then it is most probably such case. Buy the lens if you are familiar with repair basics.