JJC Markable Rear Lens Caps (Pack of 4) for Canon EF/EF-S Lenses

If you keep a few similar Canon EF or EF-S lenses in the same bag, guessing which rear cap belongs to which lens gets old quickly. These JJC markable rear lens caps are made for rear protection and for labelling, so your kit stays easier to sort and grab.

The basic idea is simple: you get four rear caps, designed to help protect the back glass area and the electronic contacts, and you can also write on the cap using markers that can be erased. It’s a practical add-on if you shoot regularly, swap lenses often, or carry lenses that are all roughly the same size.

The essentials

These are rear lens caps built for Canon EF / EF-S mount lenses. They’re there to do two jobs: protect the rear element and contacts from the usual bag-time annoyances (scratches, dust and general handling marks), and help you keep track of which lens is which.

The “markable” part is the main hook. Each cap includes a built-in white-board style area intended for handwriting, with the expectation you’ll be able to update your notes when your kit changes. That means you can jot down lens focal range or other identifying details, then alter them later without having to buy new caps or rely on memory.

In day-to-day use, it looks like this: before heading out, you cap each lens, write something like the focal range on the rear cap, and when you’re packing or swapping at the car/doorway you’re not playing a guessing game. It’s not glamorous, but it saves time and reduces the “which one was that?” moments.

What you’ll notice in use

Where these caps feel most useful is in organisation. If you own multiple lenses of similar height or size and they tend to sit together in pouches or cases, handwriting on the cap gives you a quick visual cue.

It’s also handy that the writing is described as being erasable, and the marker type is mentioned as oil-based. That combination is exactly what you’d want for short-term notes on the move—though it’s worth keeping expectations realistic: marker performance can depend on the specific marker and how you apply it, and you’ll still want to wipe the surface clean before rewriting for the best results.

Protection you can expect

Beyond labels, the caps are positioned as rear protection for lens glass and the electronic contacts. The description calls out protection against scratches, dust, water/moisture and fingerprints.

That’s a sensible set of protections for travel, day trips, or working out of a camera bag where items shift around. It’s not a substitute for careful handling—no cap magically prevents everything—but it should help reduce avoidable contact and glass wear from everyday conditions.

Tech details that matter

These caps are made from premium ABS. The selling point here is lightweight yet durable, which generally works well for accessories you’ll attach and detach often. ABS also tends to be more forgiving for regular bag use than something that’s prone to cracking if knocked.

The pack includes four rear lens caps, so you’re not left constantly moving labels around when you add or rearrange lenses.

What to consider before buying

It’s easy to like these on paper, but there are a couple of practical checks:

• Marker and erasability: the caps are intended for erasable writing and the description mentions an oil-based marker. If you already use a different marker, it’s worth double-checking whether it matches the intended approach so the writing actually wipes off cleanly.
• Your lens identification method: if your lenses are very different in size and you already identify them quickly by the lens body or case labels, the writable feature may feel less essential.

Also, while the caps are described as fitting Canon EF / EF-S mount lenses, the listing doesn’t give wider compatibility detail beyond that—so if your kit includes other mounts, you’ll want to make sure these are the correct type.

Should you buy it?

These JJC markable rear lens caps are a solid pick if you want simple rear protection for Canon EF / EF-S lenses and you also care about organising multiple similar lenses in a bag. If you regularly swap lenses, pack quickly, or carry several lenses that look alike, labelling the rear caps is one of those small upgrades that actually changes your workflow.

You may want to skip them if your lenses are already easy to tell apart without labelling, or if you prefer a completely marker-free setup. It may not be a great match if you plan to use markers outside the intended erasable/oil-based approach and you need the writing to come off reliably.

Mini FAQ

Can I rewrite the lens information repeatedly?

The caps are described as writable and erasable, so the intent is that you can write or modify lens information more than once for easier identification.

What are the caps designed to protect?

They’re intended to protect the rear glass element and the electronic contacts from scratches, dust, water/moisture and fingerprints.

How many caps come in the pack?

You get a pack of 4 rear lens caps.

Will they fit my Canon lenses?

They’re listed as fitting Canon EF / EF-S mount lens types. If your lenses are a different mount, you should avoid assuming compatibility.

Are they heavy or bulky in a camera bag?

The caps are described as lightweight thanks to premium ABS construction, so they should be practical for everyday packing.