Seems to work OK. The lens cap doesn't fit ...
580459
Seems to work OK.  The lens cap doesn't fit as well with it on though.
1741695
It's a good hood, but a little tight when I try to get my big fingers in to remove or replace the lens cap.
2587342
I bought an old Nikon lens on craigslist and it was missing a lens cap. This item does the job well and fits perfectly. Thanks!
1414789
The caps do not fit my Panasonic Lumix DMC-ZS3 52-mm-diam lens, although they appeared under the Amazon search term "lumix lens cap." This Lumix model (and presumably others) require a cap that clamps onto the outside diameter of the lens barrel. But this cap clamps into the inside diameter of a lens barrel that has a female thread for a filter. Unfortunately, the product description does not make that clear.

Result of physical inspection: The pinch clamps on these caps are spring-loaded to press outward and engage with lens barrels whose inside diameters range from 49 to 52 mm, approximately. The engaging surfaces have shallow (2 mm deep) projections with grooves to mate with the lens barrel threads. It looks like they will work OK with inside-threaded barrels, but are likely to slip out of smooth ones.

In retrospect, I should have thought all this through despite the murky description, and realized that they wouldn't work for me. Instead, these looked like such a good deal that I just went for them. So because I neglected to apply the classic "caveat emptor" principle to this purchase, I'm giving them 2 stars instead of one. I've asked to return them for a refund; we'll see what happens.
317662
Fits my 58mm filter. I like that the elastic attachment strap is tied to a hole in the cap--although instructions on how to attach it would have been helpful--it's quite simple to do. The cap stays on quite well, but when I put the camera in a tote bag with a lot of stuff, the cap did get knocked off.
3748597
For the price it works. The complaint I have, is if your cap isn't adjustable the holder isn't strong enough to hold it without a hat below it.
1438283
Fits a bit tight over the lens since I have a filter adapter and a filter, but it works. So far so good, it appears to be good quality especially for the price.
2963881
The Filter itself works just fine and does what its supposed to do but it isn't comparable with my sony e mount lens cap. So this wouldn't be something I'd recommend for EVERY lens. I bought a 72mm and a 49mm and have that issue with both lens caps.
4115773
I like these filters, but I just wish I could put my lens cap on with these still on the lens.
2569038
You know if you need this cap - you have a 35-135mm Canon lens and you lost your lens cap.  It's an exact replacement, functions same as the original, not expensive.  Do it.
4673114
works as mentioned. one less star because the cord that holds the cover to the body does not stick well to the cap. But otherwise easy to mount, does not feel cheap. Just note the size of your lens before you buy. I bought the 52 mm one and realized I needed the 55 mm cap.
197529
it seems to work ok but the cap does not stay screwed on which can be annoying
1102657
I'm not sure how or why, but I managed to lose the rear cap for my kit lens.  When I bought two newer, nicer lenses after a year and a half of using the kit lens, I realized I didn't have the rear cap.  So, I came here to buy one.  No complaints.  None.  Zero.
4250261
Sturdy replacement lenscap does what its supposed to do. Fits perfectly!
3976515
THE LENS TUBE ADAPTOR DID FIT MY CAMERA OK.  THE ONLY REASON I DID NOT GIVE IT 5 STAR IS BECAUSE IT IS A BIT LOOSE BUT DOES DO THE JOB.
229438
im happy with the lens cap and filter which i did need but the hood wasn't open enough so i couldn't take pictures with it on. plus it didn't fit like the original sony one. this one screwed into the lens
1886257
Snap on lens caps for 37MM lenses.  Works well and inexpensive.  Mine did not come with the cleaning cloth which was advertised, but not a deal breaker...for a few bucks I was ordering lens caps NOT a cleaning cloth!  Four stars even with this oversight.