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New Contributor
Posts: 1
Registered: ‎05-11-2014

broken filter threads

The filter mounting threads broke on the end of my 75-300mm III lens. All I need is a new plastic ring that screws onto the end of the lens. I am unable to use my lens cap or lens hood

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VIP
Posts: 12,925
Registered: ‎12-07-2012

Re: broken filter threads

Send it in.  Smiley Happy

EOS 1DX and 1D Mk IV and several lenses!
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Reputable Contributor
Posts: 816
Registered: ‎12-24-2013

Re: broken filter threads

[ Edited ]

A professional repair might cost more than the lens is worth.  That lens routinely sells for less than $100 on ebay. 75-300mm III SOLD on ebay

 

You might be able to buy the part for about $19 and replace it yourself. It looks like it just unscrews...

Front ring from 75-300mm II

 

It might also be a good excuse to upgrade. You could sell the 75-300  for what ever you can get, and then buy  a used 55-250 IS for about $150.  The 55-250 is optically better AND had image stabilization.

 

Is this what your lens looks like now?

 _75.JPG

 

Mike Sowsun
S110, SL1, 80D, 5D Mk III
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Respected Contributor
Posts: 1,735
Registered: ‎02-28-2013

Re: broken filter threads

I'd either super glue the hood in place or follow Mike's advice and upgrade.  It's not worth repairing.  I saw a refurbished 55-250 for just over $100 the other day.  Canon's website is down otherwise I'd link it.  Refurbished to original specs, with warranty, for a much better lens.  There's no

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Occasional Contributor
Posts: 5
Registered: ‎07-10-2017

Re: broken filter threads

I have another 75-300 that no longer works. Can I switch it?

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New Contributor
Posts: 1
Registered: ‎05-05-2018

Re: broken filter threads

the same thing happened to me, do you think i couls sand off my broken thread and attach a 55 to 58mm step up ring?

Screen Shot 2018-05-05 at 10.09.23.png

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Esteemed Contributor
Posts: 2,226
Registered: ‎11-19-2017

Re: broken filter threads

[ Edited ]

Was readng your thread until I got to the "sanding" part.  Mike's part link above still shows as available.$20. eBay has these as well under $100.  I don't buy this type of equipment from eBay myself, but you are free to choose. 

 

I saw a fully working replacement (refurb) on Amazon (super cheap) and Canon still sells MkIII $159.  Or simply upgrade.  The 75-300 was a workhorse in its day, but has been surpassed in quality, function and IQ.

~Rick
Bay Area - CA
~6D2 ~Many Lenses ~DxO PhotoLab Elite ~Windows10 Pro ~EVGA RTX 2080 FTW3 Ultra ~Pixma Pro-100
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