broken filter threads

[JSingler]

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

[ebiggs1]

Send it in.  

[MikeSowsun]

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?

 

[Skirball]

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

[JoshBlevins]

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?

[shadowsports]

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.

[Johnsonanna02]

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