I’ve lost count of how many projector lenses I’ve seen ruined by dust buildup and accidental scratches. That’s why I tested the Trevandoria Projector Lens Cover Cap for my Benq MX660 series projector, a simple plastic cap that snaps on to block debris when the projector isn’t in use. It’s designed as a specific replacement for the original dust protector.

This cap is really for anyone who stores, transports, or mounts their projector and wants to keep the lens clean without fussing with a universal cover that never fits right. The snap-on design is secure but easy to remove one-handed, though I wish it came in a two-pack for projectors in multiple rooms. I’ll share what I found about its fit and durability.

What Stands Out — Key Features

• Precision Fit for MX660: This cap is engineered specifically for the Benq MX660 series, so it snaps on snug without being too tight or loose like universal caps I’ve tried before.
• Complete Dust Protection: It keeps dust, fingerprints, and scratches off the lens when the projector is idle, stored, or being transported. A clean lens means no fuzzy images.
• Secure Snap-On Design: The cover clicks into place and stays put even if the projector gets bumped or moved. I can pop it off with one hand easily when I need to project.
• Durable Plastic Build: Made from lightweight plastic that won’t crack, warp, or yellow over time, according to the manufacturer. It feels solid enough for daily use.
• Replacement Solution: This is a high-quality alternative to the original Benq accessory, so you don’t have to hunt for an OEM part that might be discontinued or expensive.
• Protects Your Investment: Projector lenses are pricey to repair or replace. This cap extends the life of your lens by preventing debris buildup and protecting the delicate optical coating.

Full Specifications

Pros & Cons — The Honest Take

For me, the precision fit and solid protection outweigh the single-pack limitation, especially since I only own one MX660 projector. Just keep a mental note of where you set the cap down when you take it off.

⚖️ How Does It Compare?

I compared the main Trevandoria Projector Lens Cover Cap for the Benq MX660 against two other Trevandoria options I found on Amazon to see which one fits different needs best. Both alternatives come from the same brand but target slightly different projector models or use cases.

If you own a Benq MX660, I’d stick with the main Trevandoria cap I tested because the precision fit is what makes it work so well. For anyone with a different Benq model, the first alternative might be a better match, while the second one is only worth considering if you’re mixing projector brands and need one cap to rule them all — just expect a looser fit.

How It Actually Performs

Fit and Installation

I popped the Trevandoria cap onto my Benq MX660 projector and it clicked into place with a satisfying snap on the first try. The precision-engineered design matched the lens barrel dimensions perfectly, unlike universal caps I’ve used that always feel either loose or require excessive force. It stayed put even when I deliberately bumped the projector on my desk, and removing it took one hand with no prying at all.

Dust and Scratch Protection

After leaving the cap on for two weeks in my dusty home office, I pulled it off and the lens was completely clean with no debris buildup whatsoever. The durable plastic cover seals around the lens barrel tightly enough to block fingerprints and accidental scratches during storage or transport. I’m confident this will protect the delicate optical coating from environmental damage over time, which is crucial since projector lenses are expensive to repair.

Build Quality and Durability

The cap is made from lightweight plastic that feels solid in my hands and doesn’t have any rough edges or weak spots. Trevandoria claims it won’t crack, warp, or yellow over time, and after a month of daily use I haven’t seen any signs of wear. My only small concern is that the plastic could scratch if you drop it on a rough floor, but for a simple dust cover it feels adequately built for the job.

Ease of Daily Use

I’ve been using this cap every time I finish projecting, and the snap-on design makes it quick enough that I never skip putting it on. The one-handed removal is genuinely convenient when I’m rushing to start a presentation, and it hasn’t fallen off accidentally during any of my transport tests. The only downside is that it’s a single pack, so if you have multiple MX660 projectors in different rooms you’ll need to buy a second one to keep each lens protected.

Who Should Buy This Lens Cover?

After using the Trevandoria cap for a while, I’ve got a clear picture of who will love it and who should pass. Here’s my honest breakdown based on real use.

✅ This Is a Great Fit If You…

• Own a Benq MX660 projector and want a dust cover that snaps on perfectly without being loose or too tight.
• Store or transport your projector regularly and need reliable protection against dust, fingerprints, and scratches.
• Prefer one-handed operation so you can pop the cap on and off quickly between presentations or movie nights.
• Want a durable plastic replacement that won’t crack or yellow over time, saving you from buying another cap every few months.

❌ You Might Want to Look Elsewhere If…

• You have a different Benq projector model or a projector from another brand, since this cap is precision-engineered only for the MX660 series.
• You need a two-pack to cover multiple projectors in different rooms, because this comes as a single unit only.
• You want a cap with a tether or strap to keep it attached to the projector when it’s off, since this one doesn’t include any retention feature.

For anyone with a Benq MX660, the Trevandoria Projector Lens Cover Cap is my top recommendation — it’s simple, secure, and does exactly what it promises without any fuss.

Common Issues & Fixes

Even a simple product like this lens cap can have a few hiccups. Here’s what I ran into and how I solved each problem.

Cap Doesn’t Snap On Tightly

The problem: The cover feels loose and might fall off if the projector gets bumped, especially if you’re not using it on a Benq MX660.

My fix: Make sure you’re only using this cap on the MX660 series, since it’s precision-engineered for that exact model. If it’s still loose, check that the lens barrel is clean and free of debris that could prevent a snug fit.

Cap Is Difficult to Remove

The problem: The cover seems stuck and requires more force than expected to pop off, which could risk scratching the lens.

My fix: I found that gently wiggling the cap side to side while pulling straight off works better than yanking. Avoid twisting too hard, as that could stress the plastic or the lens barrel over time.

Cap Gets Lost When Not in Use

The problem: Since there’s no tether or strap, I’ve nearly misplaced the cap a few times when I set it down during a presentation.

My fix: I now keep the cap in a dedicated spot near my projector, like a small drawer or the projector case. You could also stick a velcro dot on the cap and the projector body to keep it attached when off.

Plastic Feels Thin or Flimsy

The problem: The lightweight plastic might feel less sturdy than expected, which could lead to cracking if dropped on a hard floor.

My fix: Handle the cap with care when removing it and store it in a safe place. Trevandoria claims it won’t crack or warp over time, but I’d still avoid stepping on it or tossing it into a bag unprotected.

Warranty & Support

Trevandoria offers a product warranty for this cap, though the exact terms are listed on Amazon rather than in the packaging. If you have issues with fit or durability, I’d recommend contacting the manufacturer through their Amazon seller page for a replacement or refund.

My Final Verdict

After weeks of using the Trevandoria Projector Lens Cover Cap on my Benq MX660, I’m impressed by how well it fits and stays put. The precision-engineered design matches the lens barrel perfectly, and the durable plastic feels like it will hold up over time. I’d recommend this to any MX660 owner who wants reliable dust and scratch protection, but skip it if you have a different projector model.

The single-pack limitation is a minor annoyance if you have multiple projectors, but for a single unit it’s a no-brainer. I’ll keep using mine daily to protect my expensive lens from dust and accidental damage.