Is this fungus or what?

Hensol woods

Hensol woods

  • 5
  • 1
  • 43
Harbour at dusk

A
Harbour at dusk

  • 2
  • 0
  • 39
blossum in the night

D
blossum in the night

  • 1
  • 0
  • 38
Brown crested nuthatch

A
Brown crested nuthatch

  • 2
  • 1
  • 62

Recent Classifieds

Forum statistics

Threads
198,715
Messages
2,779,751
Members
99,685
Latest member
alanbarker
Recent bookmarks
0

R Paul

Member
Joined
Oct 15, 2010
Messages
137
Location
wonderful ne
Format
Medium Format
Last weekend I took the RB out for a walk and as I was shooting I noticed that the 127mm had a lot less contrast than the other two lenses (65mm and 180mm).
When I got home, I checked and the lens has this haze on the inside surfaces of the lens elements. Nothing like clumps,but just this smooth fog on the glass. It wasn't there when bought the lens 2-3 years ago,it seems to be quite recent.
Now the question is: Is this typical of a fungus or could it be lubricant vaporizing on the glass, and what can I do about it. I figure repairing it is going to cost more than what I would pay for a new one,but I want to know what is up with it ,and do I have to worry about the other lenses . They are in the camera bag in those squares of fabric that you wrap around the lens. I do leave a lens on the camera though, usually the 65

Thanks
Rob
 

E. von Hoegh

Member
Joined
Sep 14, 2011
Messages
6,197
Location
Adirondacks
Format
Multi Format
It sounds like lubricant haze, since it's even. Fungus is never an even haze. Just unscrew the cells from the shutter and clean them.
Storing lenses in a warm environment can cause this, so can storing lenses wrapped in a synthetic fabric, or a camera bag - plasticisers can be miserable to get off glass surfaces.

Lubricant haze results when the lube in the shutter starts to creep and break down. It can also be the result of using the wrong lubricants in a half a$$ed CLA.
 
OP
OP

R Paul

Member
Joined
Oct 15, 2010
Messages
137
Location
wonderful ne
Format
Medium Format
Never thought of opening the thing myself--Well if it seems easy I will attempt it. If it starts getting complicated, I'll save it for those who know how
thanks for the advice
rob
 

Jeff Searust

Member
Joined
Sep 6, 2007
Messages
360
Location
Texas
Format
Med. Format Pan
Never thought of opening the thing myself--Well if it seems easy I will attempt it. If it starts getting complicated, I'll save it for those who know how
thanks for the advice
rob

You can easily unscrew the front element and then can get at rear through shutter. Not a big deal.
 

Gerald C Koch

Member
Joined
Jul 12, 2010
Messages
8,131
Location
Southern USA
Format
Multi Format
Usually fungus exhibits a branching structure. A uniform haze may be from lubricants.
 
Last edited by a moderator:

E. von Hoegh

Member
Joined
Sep 14, 2011
Messages
6,197
Location
Adirondacks
Format
Multi Format
You can easily unscrew the front element and then can get at rear through shutter. Not a big deal.

Both the front and rear cells will unscrew from the shutter. I wouldn't reccomend reaching through the open shutter to clean the inner surface of the rear cell, there's too much chance of leaving something in there or damaging the shutter/aperture blades.
It may take some more-aggressive-than-lenscleaner solvent to remove the haze. Try isopropyl alcohol (rubbing alcohol, 90%)
 
OP
OP

R Paul

Member
Joined
Oct 15, 2010
Messages
137
Location
wonderful ne
Format
Medium Format
Well I did take the lens apart and it seems the cloudiness is in the cement between the back lens elements before the shutter. So I guess that's that ,I just wonder how it went all at once and so uniformly. But I did learn how to disassemble a lens (and put it back together again)

Thanks for everyone's help
Rob
 
Photrio.com contains affiliate links to products. We may receive a commission for purchases made through these links.
To read our full affiliate disclosure statement please click Here.

PHOTRIO PARTNERS EQUALLY FUNDING OUR COMMUNITY:



Ilford ADOX Freestyle Photographic Stearman Press Weldon Color Lab Blue Moon Camera & Machine
Top Bottom