topic Can collar be replaced on EF 75-300mm 1:4-4.6 III - The collar that lens cap clips onto is broken. in EF & RF Lenses

Can collar be replaced on EF 75-300mm 1:4-4.6 III - The collar that lens cap clips onto is broken.

staceygrosvenor — Wed, 27 Sep 2023 03:42:56 GMT

My Canon lens was dropped and the collar (outer ring) was broken and now the lens cap won't stay on. I see three small screws around the perimeter of the collar, and am thinking it may be replaceable. Does anyone have advice on how to replace the broken piece? Where to buy that part - assuming it's available for purchase?

Re: Can collar be replaced on EF 75-300mm 1:4-4.6 III - The collar that lens cap clips onto is broke

Anonymous — Wed, 27 Sep 2023 04:04:24 GMT

You could call Canon's parts department:

Canon Parts Dept Canon Parts Order Desk at (866) 481-2569 Weekdays from 9 AM - 7 PM, ET.
You need the Lens Barrel Front Filter Ring Assembly.

I did a Google search on "EF 75-300mm 1:4-4.6 III parts" and AliExpress has the part (Lens Barrel Front Filter Ring Assembly). It looks like the 3 screws hold it in place.

Re: Can collar be replaced on EF 75-300mm 1:4-4.6 III - The collar that lens cap clips onto is broke

staceygrosvenor — Wed, 27 Sep 2023 20:05:09 GMT

Thank you so much Bob for the quick and helpful response!

Re: Can collar be replaced on EF 75-300mm 1:4-4.6 III - The collar that lens cap clips onto is broke

Anonymous — Wed, 27 Sep 2023 20:58:22 GMT

Glad to help. It looks like an easy fix. Is the lens still functioning properly?

Re: Can collar be replaced on EF 75-300mm 1:4-4.6 III - The collar that lens cap clips onto is broke

staceygrosvenor — Thu, 28 Sep 2023 02:57:14 GMT

Yes, the lens works fine. And I just purchased it a few months ago. The only problem is that I cannot get the lens cap to stay attached with that ring being broken. I ordered that replacement part from AliExpress, but it's coming from China and may take a few weeks to arrive. I'll keep you posted on how it goes... 🙂

Re: Can collar be replaced on EF 75-300mm 1:4-4.6 III - The collar that lens cap clips onto is broke

Anonymous — Thu, 28 Sep 2023 03:11:53 GMT

Sounds good. If you don't have a set of JIS screwdrivers, you may want to get them. They look like Phillips screws but are actually JIS screws and a Phillips screwdriver may strip out the screw head.

Re: Can collar be replaced on EF 75-300mm 1:4-4.6 III - The collar that lens cap clips onto is broke

staceygrosvenor — Sat, 30 Sep 2023 00:13:37 GMT

Oh....thank you for that tip. You're right, I was thinking they were Phillips head screws.

Re: Can collar be replaced on EF 75-300mm 1:4-4.6 III - The collar that lens cap clips onto is broke

Anonymous — Sat, 30 Sep 2023 00:17:33 GMT

Let us know how you make out on the repair.

Re: Can collar be replaced on EF 75-300mm 1:4-4.6 III - The collar that lens cap clips onto is broke

Tintype_18 — Sat, 30 Sep 2023 12:51:25 GMT

Curious...the tabs on the lens cover should engage when not in the broken part.

Re: Can collar be replaced on EF 75-300mm 1:4-4.6 III - The collar that lens cap clips onto is broke

staceygrosvenor — Sat, 30 Sep 2023 23:15:57 GMT

Because the front filter ring broke apart, it can sort of hold the lens cap on there (if I put it on there just right), but it doesn't for long. If the lens gets touched while placing it back into my camera bag, for instance, the lens cap comes off. The broken ring doesn't have any grip to hold onto the lens cap.

Re: Can collar be replaced on EF 75-300mm 1:4-4.6 III - The collar that lens cap clips onto is broke

staceygrosvenor — Thu, 12 Oct 2023 03:02:26 GMT

Got the replacement part that I ordered from AliExpress. Only took a couple of weeks to arrive (from China). Was going to try to replace the broken part myself (with the JIS screwdriver set that I had), but I was worried that I might strip the screws. They didn't want to unscrew easily from the lens. So rather than pushing things, I just took the lens and the replacement part to my local camera store, and they repaired it right away. All in all, I spent $21 for the part, and then another $25 labor. And it's good as new now. Thanks to everyone (especially Bob) who helped get me going in the right direction. Much appreciated.

Re: Can collar be replaced on EF 75-300mm 1:4-4.6 III - The collar that lens cap clips onto is broke

Anonymous — Thu, 12 Oct 2023 03:10:35 GMT

Thanks for updating us on the good outcome.

Re: Can collar be replaced on EF 75-300mm 1:4-4.6 III - The collar that lens cap clips onto is broke

kataryna1985kk — Tue, 27 May 2025 10:59:40 GMT

probably not helpful for most, but i was able to 3d print a replacement i modelled for cheap, but no lens hood attachment now

Re: Can collar be replaced on EF 75-300mm 1:4-4.6 III - The collar that lens cap clips onto is broke

ebiggs1 — Tue, 27 May 2025 14:16:10 GMT

"probably not helpful for most,..."

Probably not since it is a 2 year old thread.

Re: Can collar be replaced on EF 75-300mm 1:4-4.6 III - The collar that lens cap clips onto is broke

kataryna1985kk — Tue, 27 May 2025 14:57:29 GMT

a 2 year old thread about a popular lens with a common issue. same happened to me

Re: Can collar be replaced on EF 75-300mm 1:4-4.6 III - The collar that lens cap clips onto is broke

ebiggs1 — Wed, 28 May 2025 14:15:53 GMT

Glad you found the solution but most won't.