Question about Tamron 300/2.8 LD Lens

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How can you tell if there is oil or fungus on the lenses. I have had these stored for quite some time in carrying cases. I don't see anything and just wondered if these are visible or otherwise. I have a Tamron 4/200 mm screw on and a 50 mm screw on. Thanks, Wally

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This site has some good information- it's for a Minolta camera, but lenses are lenses when it comes to fungus and oil:
http://reviews.ebay.com/How-To-Detect-Flaws-in-Used-Camera-Lenses-on-Ebay_W0QQugidZ10000000001005542
It's also a good article.
Basically, it takes keen inspection. And they also use ultra-violet light. Here's another good site:
http://www.zeisscamera.com/services_overhaul-cIIa-lenses.shtml
Here's some examples of fungus (except for the "exaggerated" one):
http://www.pentaxforums.com/forums/pentax-beginners-corner-q/78911-what-does-lens-fungus-look-like.html
If you don't see anything with a 20x loupe and good lighting, I wouldn't think you have anything to worry about.
Good luck, and hope this helps.

Posted on Oct 08, 2010

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Smudge showing up in view finder and on photo PowerShot SX210


Is there a visible smudge on the front element of the lens? If so, you can use a LensPen or cleaning cloth from the photo department of your favorite store.

There is the possibility that there is fungus growing inside the lens elements of the camera. Humidity can allow this to happen over time with camera lenses as well.

If you have fungus inside the lens, you may need to check with a repair shop... buying a new camera may be in your future.

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How to avoid fungus on Digital Camera Lens?


The dreaded fungus is something that bothers every photographer. I have suffered from it before, and every coming rain gives me constant worries of possibilities of fungus growing somewhere inside my lenses. I am more vulnerable to fungus than most people because I don't think much about taking out the camera to get some good shots even if it has been raining a bit, and have often got plenty of rain drops on the camera and the lens therefore.

Where does fungus comefrom?
  • Fungus spores are everywhere and germinate under suitable environmental conditions:
  • Relative humidity of at least 70% (more than 3 days)
  • No or little airflow
  • Darkness
  • Nutrients (textile lint, traces of grease, varnish, dust and dirt)
  • Temperatures between 10 and 35°C
How can fungus be avoided?
  1. Silica Gel. This seems to be the easiest and common way to avoid fungus, but I haven't had much success with it either.
  2. . Store the lenses in an airtight container. Again, you may need to put a few Silica Gels in the container. Putting too many of Silica Gel is known to dry out the lubricants in the lens, so you need to use your discretion with quantity of the Silica Gel.
  3. . A popular idea is to install a low wattage tungsten bulb in the closet where you keep the lens. This will keep the place warm and dry, preventing the fungus. This is known to work.
  4. . Store the lens in transparent container. Fungus is known to fear light and love darkness. Also make sure that the lenses are not stored in leather bags, as leather can easily attract fungus.
  5. And finally, of course, the best way to prevent fungus is to get out and shoot more often.
  6. After the work is done, immediately clean the instruments. If possible, you can use a fan or blower to facilitate evaporation of surface moisture.




on Feb 13, 2010 | Cameras

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How to remove fungus inside inner Tamron's lens


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May 06, 2012 | Cameras

1 Answer

How do I disamble a TAMRON 28-80 aspherical lens. The inner lebs is cloudt/dirty


Sorry, you don't. It's a professional job only as you need lens calibration equipment which you won't possess.

In any case, if there's a cloudy element it's probably lens fungus. Lenses which are badly infested are best discarded as they're totally uneconomic to repair unless they are very high value specialist items. Yours isn't.

Jun 26, 2011 | Tamron AF 28-80mm Lens

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I have quite a lot of fungus inside my sigma mirror ultra lens, the front lenses were easy to get out and polish but I am concerned about dismantling the smaller rear lenses. Are there any complications to...


Holy Smokes, well if I were you right now I'd put it back together and send it to Sigma for repair cause you dismantle a lens like that there is no way you are going to align those lens elements without the proper equipment.

Using anything more then lens cleaner for camera optics will in fact remove the coating from the lens.

What you have isn't like the lenses from a "View" camera where it was possible to remove one lens group and replace with another but, those lenses were made and used 70 years ago.

Lens technology has changed a bit since then.

I had a manual focus Nikon F2.8 lens one time that had a coating separation on the front element that caused some wicked flare. I took eye glass cleaner and Windex to it to remove the rest of the coating so I could continue the shoot. I then sent the lens to Nikon for repair.

Best of luck with that one

Apr 27, 2011 | Cameras

1 Answer

I have some quality film cameras that have been in storage for a nmber of years. Does lack of use damage film cameras? How can you check for damage?


It won't "damage" them, but it isn't good for them. Over time, the lubricants can seperate, drain out and drip onto things they shouldn't, gum up, etc. moisture can get to things, humidity, heat, fungus can get a chance to grow, corrosion. There are so many things that, over time, can go majorly wrong that when something is being used on some kind of regular basis can be caught and stopped while it's still cheap.

The only way to find out is to go through and test each item one by one. Check lenses for oil on the blades, separation in the elements, fungus growth, etc. Cameras for shutter function and meter function. If lenses have shutters, check them. Generally, if the 1 or 1/2s times aren't correct, neither is anything else.

Apr 26, 2011 | Photography

1 Answer

I got my pentax k2 camera lens cleaned for it has got fungus. Now the lens has been completely ruined and I am not being able to use the camera at all. Could anybody tell me where can I get lens for the...


Cleaning a lense for fungus is an iffy if not impossible procedure most of the time as the fungus attacks the material of the lense itself and parts of the lense have to be removed to remove the fungus.

But, the good news is any dealer of new or used equipment will have K-mount lenses. You can find both new and used lenses from B&H, KEH, Adorama, Calumet, and others - though those are some of the most reputable online/mail-order dealers of used and new equipment. You can find almost any kind of lense you'd desire.

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1 Answer

Hi, I have a nikon lens that has fungos inside the lens, is there any way to clens it?


Hello. Sadly, the answer is no. You must have the lens repaired by a tech. If the fungus is on the front lens element, trying to remove the lens for cleaning will invite disaster in short order. There are hidden set-screws, grease, precise distances, and sometimes timing positions involved. If the fungus is severe enough, the actual glass element will have to be replaced because fungus can etch itself into the surface! The key to preventing fungus is to NOT store the camera/lenses in a cool, dark, place like a closet or drawer. If you do need to store the system for a longer period, remove all batteries, use a desiccant(the little packet that says DO NOT EAT) which absorbs moisture, and then close up everything in a sealed bag. This keeps any extra moisture from entering the sealed environment of the bag while the desiccant keeps the interior extremely dry.---Hope this helps!---Rick

Oct 02, 2009 | Cameras

1 Answer

I have a Minolta Rokkor-x 200mm telephoto lens with fungus


Lens fungus is really common and it's not cost effective to repair. Even if the fungus is removed then the multicoatings are permanently damaged.

The good news is that until the fungus becomes pretty severe the image quality doesn't suffer much as most photos use the lens stopped down to some extent and this means that if the centre of the lens is clear then there's nothing to block the light paths.

Unfortunately it does tend to spread, so keep affected lenses in a separate camera bag to the rest and if you can afford to do so then throw them away and replace your camera bag as it will be loaded with microscopic spores waiting to attack more lenses. Making sure that your camera and lenses are completely dry and free of condensation before storing them until next used will prevent reoccurence.

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2 Answers

Fungus in the lens


These lenses arn't designed to be taken apart.

A camera specialist may help but they should alwys be kept dry and at room temp never warm and humid. Silicate gel in your storage bag also prevents this from happening.

Good luck

Marc

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