Locating specific lenses inside your camera bag is much easier when each lens has a different colored rear lens cap, such as the gold Designer Rear Lens Cap for Canon EOS EF & EF-S-Mount Lenses from Fotodiox. This cap can be used as a spare or replacement cap. Premium-grade ABS plastic construction ensures strength and durability.

Fits Canon EOS EF & EF-S Lenses    Easily Identify Lenses    Replacement Item    ABS Plastic

Related Questions and Answers

Q: 1. Will this work on the 80D?

A: Yes this would work perfectly on your Canon 80D.

Q: 2. How do I make this adapter work ? By simply attaching it to the EF lens or have to do some further tweaking in the camera.

A: No further steps are necessary. Simply attach the Canon EF-RF Mount Adapter to the camera and attach your EF lens to it.

Q: 3. Does this adaptor work with the Eos 5D Mark IV?

A: No, Canon Mount Adapter EF-EOS R is design to fit Canon DSLR lenses (EF or EF-S) to mirrorless camera bodies, The adapter has a Canon RF camera mount therefore you can not connect to Canon 5D mark IV which has a Canon EF lens mount.

Q: 4. Are there caps on this? I am concerned about dust. Without caps my concern is you have a little cup pointing up catching dust, you put the lens on and flip it, dust falls onto rear of lens, put lens back on camera, dust in camera.

A: there are no provided caps....you could use a camera body cap or use two lenses so that it's always covered ...just a note--the camera body caps don't fit very tight...at least mine don't...

Q: 5. Would this product hold up to having two large L telephoto lenses attached all day on a long hot day outside? Can the plastic hold up to it? I was just thinking if a person became good at this change-over system, this could hold the 2nd and 3rd lenses, counting the 1st on the camera body. Is there anything that tells of a maximum weight or anything that would prevent this?

A: Holding two lens would not hang or balance as good on the side of your body. I first researched the product on the manufactures webpage. The center ring is all metal and there was a video of a man hanging off the strap. Who knows if it was not a lucky try and many breaks, but it shows the center is quite strong. The lens mount strength are all in the screws holding the metal rings to the body but it looks strong enough to support a large lens over time. I have only briefly owned mine but it seems to be a well made product. One dropped expensive lens would be too much bad press for such a company, I would think.

Q: 6. Hi, I have a Samsung mini and I recently purchased a c mount lens adapter. I was wondering if this adapter would fit my c mount adapter.

A: This is an adapter that allows you to mount Canon EF lenses on cameras with a C-Mount. I am not familiar with a camera called the Samsung Mini but if you are referring to one of their Smart Phones this product is unlikely to work. Feel free to email us directly at provideo@bhphoto.com if you require further assistance.

Q: 7. Will this attach an RF 85mm f2 lens to my canon eos 90d?

A: No, the Canon Mount Adapter EF-EOS R does not allow an RF mount lens to attach to a EF/EF-S mount camera. And as of now there are no adapters that work to do that.

Q: 8. What is the height of this item?

A: The Lens Mount Cap Single is 5/8" high.

Q: 9. I am about to put my Rokinon Cine Primes on my Bolex H16 and shoot some Tri-X 200 asa. Has anyone tried this? Is there a calculation for setting exposure to adjust for using the c mount to eos ef Canon adapter? If no one responds I will be happy to post my results.

A: The iris on this adapter is not needed for use with manual lenses like the Rokinons. You just use the manual iris on the Rokinon lens while leaving the iris of the adapter at its widest opening. The adapters iris is meant to compensate for loss of the iris control of a Canon EOS EF lens. Now in the digital world you could just set this up and see the effect of the adapter iris immediately on screen. However, since you are shooting film, we suggest doing what a professional would do before principal photography and that would be to shoot an exposure test. (there is no available exposure calculation chart for this adapter.) Line up a shot of a person holding a grey card plus a notation of what the f/stop is that you have determined by using a light meter. You can use a clapperboard or a clipboard to display the card and the f stop. (Do yourself a further favor and have it held steady in the frame held by a grip stand.) I would shoot at a variety of f/stops so that I would know what was happening if I was to shoot at those f/stops. As you can see, we strongly suggest sacrificing a roll of film this way so that you know you are getting correct exposure once you start shooting for real.

Q: 10. Can I use this adapter to mount a Canon 24 to 70 mm l lens to my Black Magic URSA PL camera?

A: We are sorry to say it cannot. This is an adapter for putting EF lenses on a Sony FZ Mount camera. There is no adapter that will allow you to put an EF lens on a PL mount camera.