Glass with dust?..

[Nugard]

Bought a 35mm cron, but it seems to have something on the glass...

I hope that it's not scratches - only dust... Also, that dust can only be seen on-light looking (as on the photo)...

Any comments from somebody who have seen such things and have knowledge how to clean them, perhaps with the help of Youxin Ye, or some other master?.. How much would it cost to make a cleaning?..

 

[paradoxbox]

it's hard to tell without a better picture, but to me that looks more like fungus than dust.

dust or even scratches inside the lens don't affect performance much except when shooting into the sun or a light source. even on the front element it doesn't make much difference. on the rear element it does though.

if it's fungus i would say that can be cleaned easily without any damage, though it will cost a bit of money to have it done, and most repairmen will never guarantee the lens as the fungus can come back any time if the right conditions occur again (the spores are EVERYWHERE)

use a pen light to check the lens more carefully and see if it looks like little spiderwebs or snowflakes growing inside. if it does, then it's fungus.

i bought an old sigma 17-70mm macro lens that is fantastic. super sharp photos. it also happened to have a huge scratch in the front element, making it cheap to buy. the scratch is so big that you can see it easily from several feet away. doesn't effect the photos at all. filled in the scratch with black and it's all good.

 

[Nugard]

Thank you paradoxbox!..

Any more opinions?..

 

[sc_rufctr]

More likely dust IMO. Not a big deal to get fixed.

 

[Mackinaw]

Looks like dust to me. Depending on the lens, you my be able to clean yourself.

Jim B.