Question about Tamron 18-250mm F/3.5-6.3 AF Di-II LD Aspherical (IF) Macro Lens for Konica Minolta and Sony Alpha D...

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How to get the lens apart to clear bits on the front element

Hi have recently purchased this lens from ebay second hand, and there appears to be sand or something inside.So i was wondering how easy it was to take it apart to blow this stuff out?.It is a pentax fit lens.

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  • kakima May 11, 2010

    Taking a lens apart is not that hard, you shouldn't need much more than a set of small screwdrivers. Putting one back together is a totally different matter...
    Do you have a lens collimator? Without one, you're not going to be able to make sure the lens elements are properly aligned.

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The front element is easy to remove.
There's a plastic cover on the front of the lens which has a very small hole in it.
Get something like a very small screwdriver in that hole and prize the cover off.
Remove the 3 screws in the next plastic cover and remove it.
The next 3 screws you see hold the front lens element on.
This whole part rotates to adjust the infinity focus and is kept in position by those 3 screws.
Make sure you mark the position by maybe making a small scratch in the plastic next to one of the screws.
Or maybe scratch around one of the screws.
With those 3 screws removed the front element with the lens just falls out.

Posted on Feb 06, 2013

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Unless you just happen to have a lens collimator handy to ensure that you've got the elements in parallel, I wouldn't even consider taking the lens apart. And, I suspect, if you have a lens collimator you wouldn't have asked this question.

Leave this job to a professional with the tools to put the lens back together again.

Posted on Feb 05, 2010

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Posted on Jan 02, 2017

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Hi,IF I were you I will search the eBay for a same lens as " parts only " which means lens does not work but you can use the some parts of it ..There are a lot on ebay..one example is below URL..pls visit both..
Brand name services always do this..Since you were doing unauthorized repair ,they do not like it..
Hope this helps! Take care and please Remember to rate/vote and
give me 4 Thumbs Up for me to continue for Helping out the Community :)
Thanks

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Item condition:For parts or not working

http://cgi.ebay.com/Nikon-Nikkor-18-200mm-ED-AF-S-3-5-5-6-READ-/200635517251?pt=Camera_Lenses&hash=item2eb6cf0943
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parts;
http://photography.shop.ebay.com/Lenses-/3323/i.html?_kw=Nikon&_kw=parts&_dmpt=Camera_Lenses&_stpos=&gbr=1

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