Go Back   Steve's Digicams Forums > Digital SLR and Interchangeable Lens Cameras > Canon Lenses

Thread Tools Search this Thread
Old Jan 27, 2008, 12:56 AM   #1
Junior Member
Join Date: Feb 2006
Posts: 12

How can I know if this lens has fungus or no, in the picture attached there seems to be some kind of stain, I believe for what I saw it's on the second lens starting from the front. The white dots are just dust.

It's a used 70-200 L 2.8 at 700$ (american dollars).

By the way, the stain is really difficult to see, I had to look a lot at the lens to find it, other people who checked the lens didn't find it either. And obviously I took the picture in the angle where the light reflects more of the stain and leveled up levels on pothoshop so it would be more visible to you. The iso was at 3200.

What do you think?

pd. Sorry for the grammar. English is not my mothertongue.
Attached Images
harybd is offline   Reply With Quote
Sponsored Links
Old Jan 27, 2008, 8:14 PM   #2
Senior Member
NHL's Avatar
Join Date: Jun 2002
Location: 39.18776, -77.311353333333
Posts: 11,331

IMO this is typical of a lens that has been through hot climate from an air conditioned room - Moisture has condensated inside the front elements and when it evaporated left some residues behind... I just went through this exercise from my birding trip in the Carribean

-> The same thing would happened I guess when one uses a lens in outdoor cold weather and took it back in a heated room... A lens case is probably the best solution as one allows the lens to slowly adapt to theses abrupt change in the environment!

You can probably send it out for cleaning

NHL is offline   Reply With Quote
Old Jan 28, 2008, 5:46 PM   #3
Junior Member
Join Date: Feb 2006
Posts: 12

thanks for the answer.

One more thing I'd like to know is, If I send it to clean or calibrate the focus, will the lens loose picture quality? (being it's quality the "L" type)
harybd is offline   Reply With Quote
Old Feb 7, 2008, 7:10 AM   #4
Senior Member
xiggy's Avatar
Join Date: Oct 2007
Posts: 129

i think it would gain in picture quality from how it is now, but i dont think it would loose any picture quality at all from a new 70-200 L lens
xiggy is offline   Reply With Quote
Old Feb 7, 2008, 7:43 AM   #5
Senior Member
Cyberf828's Avatar
Join Date: Sep 2006
Posts: 659

Anybody have a lens cleaned?? What would the price be around?
Cyberf828 is offline   Reply With Quote

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

All times are GMT -5. The time now is 5:05 PM.