Question about Tamron 28-300mm f/3.5-6.3 DI XR for Canon

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Tamron 28-300 loose lens parts

Can I take this apart and attempt to fix it myself? Tamron wants $100 to send it in and fix it, thus its cheaper to buy a new one whihc I have done. Figured I could try to take apart the old one and try to fix it, if I fail I'm not really out anything. Thanks

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  • fishsqueezr Jan 19, 2008

    there is small, dime sized lens that came out, and inside i can see a larger lens set in a small platform that moves from side to side. I can't figure out how to get inside the canister to get at the latter lens.

  • fishsqueezr Jan 21, 2008

    Somewhat helpful. I took the whole thing apart from the rear and at the end realized I could get to 1 of the 2 pieces I needed to fix from the front of the lens by removing 3 small screws hidden under the rubber gasket around the front lens. Would have saved me quite a bit of time. I did need to go through the rear and disconnect the motor electonics (very easy) to remount the dime-sized lens mentioned above however. I continued dismantling past this though thinking I could not get to anything from the front.

  • Anonymous May 11, 2010

    What needs repaired with the lens?



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The way in to this lens is from the rear. You'll need to remove the trim ring inside the mount and free the electronic connector from the mount ring before you remove the mount ring itself.

Posted on Jan 19, 2008


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Posted on Jan 02, 2017


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This lens is probably ruined anyway, before you began your DIY attempts. Take it to a repair facility, but be prepared for a hefty bill, even if they will countenance attempting to repair it.

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My lens no longer auto focuses and is continually hunting the image, I have confirmed it is a lens problem by changing camera and lenses and it is only the tamron which is a problem

Unfortunately this is a risk when you use third-party lenses. The camera manufacturer's lens to body protocols are not open source nor do they licence the technology to alternative suppliers, so all that companies like Tamron can do is to try and reverse engineer the system.

You only have two possible fixes:-

1. Replace the lens with a Sony Alpha model; or

2. Contact Tamron to see whether they offer an update service for your lens.

The latter is certainly possible with some brands/models, but the costs have historically varied between "you pay just the shipping and handling" right up to "it's cheaper to buy a new lens".

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Wow I appreciate your spirit but this is probably a loosing battle. Even if there was a repair manual you would still need the tools. This is a $150.00 - $200.00 lens. I'd probably elect to buy a new one and sell the broken one on EBAY for parts or try to take it apart just to satisfy my curiosity. Sounds like you like adventure.

Good Luck!

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First question "is it worth repairing" if it were mine I'd look to see what a new one is worth then divide that in half (cause that's what you might be able to buy a used one for) then figure about $120.00 for cleaning lubricating and adjusting the your lens. With your lens you know what you have, buying used might need the service. you are the one to decide. As for the second question "can I repair it myself" short answer no. If you have to ask if you can repair it then you don't have the necessary tools and general knowledge of how to dismantle and reassemble the lens (and have it work when finished). The lens took a hit and most likely set the inner and outer lens barrels out of alignment causing the inner barrel to slip out of its seal and or focusing gear and hang things up forcing it will break parts causing more repair costs. All else fails get an estimate before repair. Been there with a lens myself and after a couple a months without bit the bullet and had it repaired. Cheers best of luck

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You can buy a replacement on auction websites for anywhere between £30 and £80, and for about £20 to £60 less if you're prepared to accept the f2.8 version which is one stop slower at maximum aperture. Even at the higher price you'll find that it's cheaper than having your lens professionally fixed (or even for paying for a diagnostic strip-down only to be told it's irreparable). However, you can offset some of the cost by selling your lens in it's current condition and honestly described as being for spares or repair. As it's the faster f2 model it's always in demand and will appeal to those who have the skills to restore it to working condition. Another one to search for (and much easier to find) is the excellent Tamron 24mm f2.5 which typically sells for around £20 to £35, although you may have to spend more to obtain the correct interchangeable Adaptall-2 mount for your camera (but you can get most of that back when you sell the unwanted mount supplied with the lens). As the maximum aperture is f2.5 the lens is only about a half a stop slower than yours.

I hope that my reply has helped, if so please rate my answer.

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1 Answer

Loose lens

Hi, I have the same problem with the same lens. Did you fix it yet? Mine is the Tamron Aspherical LD XR Di II SP 17-50 f2.8. I'm thinking about getting the screwdrivers to it.

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If you're in the UK you additionally have Sale of Goods Act protection for up to six years in England and Wales and five years in Scotland. Either way, the Act allows you to demand a full refund or replacement from the retailer; I'd suggest a refund as bad lenses often come in batches and a different supplier is less likely to have one from the same production batch.

Note that any attempt to fix the lens other than by normal use of the lens and camera controls may completely remove your warranty benefits or consumer protection.

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