Question about Tamron 200-400mm F/5.6 LD Lens

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"Blossoms" on coating of some lens elements

Just picked up this lens at a garage sale of all places...real cheap. Put it on my Nikon 300s and it worked fine. Took it home and naturally cleaned the front and rear elements. While cleaning the front element, I noticed that the next two internal elements appeared to have corruption of the lens coating in multiple places. I took a few test shots, and none appear to be compromised by the problem. I'm sure if I drilled down deeply, I could find some image diffusion as a result, but I'm just not that crazy about my image quality. I'm an amateur...not pro. This is my first non-Nikon lens, and It just bothers me to see some element issues in this lens. Should I try to have these recoated or something? And since I only paid $50 for the lens, is the repair going to be 4 or 5 times the cost of the lens? Thanks to all.

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  • dennismc80 May 03, 2010

    Good to know what to expect with this lens. Thanks.



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If it bothers you that bad you can have it recoated. It will cost you around 125 -150 to have it done. You need to tear down the hole lens to have it done. You will need to take it to a camera shop to have it done also.

Good Luck

Posted on May 02, 2010


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What adapter do i need to make a vivitar 52MM wide angle lens work with a Nikon D-3000 with a 18-135MM lens?

I'm afraid this will not work.
The filter size from the Nikon is 67 mm. and your vivvitar had a 52 mm tread. The step down convertor from 67 to 52 will block to much to use the wide-angle convertor.
I think you still will see a wider part in the centre of the frame, but in the end, the vignetting that takes place, will leave you with only a part of the picture to use. What stays will be smaller than what you pick up with the lens in the 18 mm setting.

Just try what you see, when you just hold the vivitar in front of the lens and shoot a picture. Take care you don't scratch the front lens of your 18-135. put a cheap UV filter, when you want to test.
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Nikon coolpix

Not sure what Coolpix you have, I assume one young one. Not knowing how you did set up the camera, I even have to guess more.
I start with a questions, and I hope when you try to answer this, you will take the camera in your hands. You even could look into the manual if you have it, or pick up the manual on Nikon USA.
Did you put your camera in any other mode then the automatic mode?
When the dial is on the green camera logo, you should be fine. If not, try to switch to automatic and take a picture.
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You also should look if the front of the lens is clean. Don't start rubbing the front element, only use the correct lens cleaning cloth or lens pen. Never use a paper towel or any fluid, that is not special made to clean a lens. The coating of every lens is essential for its sharpness and for correct colour. With a little alcohol you ruin every lens, because it could resolve the coating. Please, if you still have problems, tell me what model coolpix you use and does not what you want.

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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

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1 Answer

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Re-coating is not usually possible and will cost more than a new lens element.

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The real question is whether the marking is readily visible in the images and if so whether it's a minor artefact which can be edited out? If so, then repairs to the lens are simply not worth doing.

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Some people have tried gently twisting the camera lens back into place or gently tapping/bumping the side of camera.

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Contact Nikon Service for more help with your D60 below:

I hope this helps!

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