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What is this on Pentacon 135mm?
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PostPosted: Tue Aug 29, 2017 9:38 pm    Post subject: What is this on Pentacon 135mm? Reply with quote

Hello all.

I would like to konw if you could help me with the Bokeh Monster I just bought.
I am not sure if the rear lens has some oil on it or is it a fungus?

I attached a couple of pictures more so you can help me with th state of the lens.




#1


#2


#3


#4


I don't know why the images do not appeare in the post (they do in the preview)...so I attach the link:



forum.mflenses.com/userpix/20178/10348_Rear1_cr_1.jpg

forum.mflenses.com/userpix/20178/10348_Inner_1.jpg

forum.mflenses.com/userpix/20178/10348_Front_1.jpg

forum.mflenses.com/userpix/20178/10348_Rear2_cr_1.png




Thank you all and best Regards


PostPosted: Tue Aug 29, 2017 10:18 pm    Post subject: Re: What is this on Pentacon 135mm? Reply with quote

PAkDocK wrote:
Hello all.

I would like to konw if you could help me with the Bokeh Monster I just bought.
I am not sure if the rear lens has some oil on it or is it a fungus?

I attached a couple of pictures more so you can help me with th state of the lens.




#1


#2


#3


#4


I don't know why the images do not appeare in the post (they do in the preview)...so I attach the link:



forum.mflenses.com/userpix/20178/10348_Rear1_cr_1.jpg

forum.mflenses.com/userpix/20178/10348_Inner_1.jpg

forum.mflenses.com/userpix/20178/10348_Front_1.jpg

forum.mflenses.com/userpix/20178/10348_Rear2_cr_1.png




Thank you all and best Regards


reposted, images don't show on first post. It's an anti spam measure.


PostPosted: Tue Aug 29, 2017 10:27 pm    Post subject: Reply with quote

It does look look like fungus, but it's not too bad and should easily clean off with isopropyl alcohol or my usual treatment - cold cream. They are easy enough to take apart as well.
It's a great lens, well worth cleaning.


PostPosted: Wed Aug 30, 2017 10:28 am    Post subject: Reply with quote

Thank you Lloydy, for both the reply and the answer.

I was really convinced that this stain was just oil, because it is not a hairy shaped fungus or haze.

How could I clean it?
White vinegar would be enough?

Regards