Lens Tube Adapter 67mm for Canon PowerShot SX520 HS SX60 HS SX50 HS SX40 HS SX30 IS SX20 IS SX10 IS SX1 IS

Okay, the main issue first: it's definitely not worth spending more for the Canon-made version! This does the job fine, and a little hard-plastic ring is all any maker's version is going to be.Once I figured out how it went on, I had no real problem with the attachment process: just face the filter-screw threading outward, line up the two parts of the guide mark at the side, then push on and turn 90 degrees (until the line matches up with the dot at the bottom on the barrel).It does NOT form a complete seal, though, so you will still need to clean off your camera's lens regularly when dust or moisture gets in behind this.The design has the circle divided in 4, with 90-degree arcs of attached vs. loose, and clockwise/counter-clockwise makes no difference when detaching. On my old camera (a Canon S2 IS, overdue for an upgrade!) there was a release button that had to be held down when detaching the adapter; the SX40 has no such lock or stop, so when I'm changing a filter I worry that I'll turn both layers, and set the adapter loose again.I like the fact that the adapter attaches just below the tip of the lens barrel, and moves in and out with the zoom; my old S2 required a bulky adapter cylinder/cone because it attached at the base! I do rather wish there was some way to slope the abrupt transitional profile, though -- it sometimes feels like you stuck a saucer on the end of the lens barrel, when you're trying to edge the "nose" in somewhere. I actually accidentally "popped" the filter assembly off once when I moved the camera too hastily back from a window frame, and was just lucky it didn't break anything. More plastic wouldn't add much weight, but it would mean a larger item again, a nuisance if you're carrying it in your bag rather than attached.Anyway, if you want to add accessory lenses or filters to the SX40, though, that's the way it goes. The design is what it is, for good and for ill.The particular Vivitar specimen I received has a little molding dimple or "hiccup" in one edge, but it does not affect either the latches or the screw threads.UPDATE: I found one important negative/risk with having it attach to the end of the lens barrel. I didn't always use to make sure to turn the camera off when cleaning and reattaching the adapter-plus-UV-filter (which I leave on as a lens protector), but once when I went to push it back on, the extended lens gave a bit under the pressure -- I'm crossing all my fingers that I haven't stripped the gears! It seems to be OK so far, but I'm not chancing this happening again, and the damage becoming cumulative. (On the S2, no force was required -- simply align and turn, and it clicks solidly into locked position, so this wasn't an issue. <Sigh>) LEARN FROM MY MISTAKE, and always turn the camera off first, so the lens will be fully retracted!!!UPDATE 2, November 2012 -- It just broke. That's within the year, so I'll see how the warranty replacement process works out.

Got what I paid for! It does the job on my SX520. There are a couple of things one should be aware of though:1. The adapter is extremely difficult to attach to the bayonet mount on the camera lens. Be careful and patient and it will fit ... otherwise you risk buggering it up. Then one has to decide whether to leave it in place always: I would recommend leaving it on.2. Since the cameras in the Canon SX line are small bodied, this adapter ring will cause you 2 serious problems because it extends beyond the original diameter of the lens. First is that it will partially block the focus assist lamp to the upper left of the lens. Second is that it will block some of the bottom of the flash field and you will see a shadow on close shots. One has to determine whether being able to use filters is worth those problems.3. Filters tend to 'stick' in the adapter. Use a little bar soap on the filter threads to ease removal later.4. The adapter is plastic and easy to damage if one is not careful. The adapter only comes in plastic, even from Canon. This adapter is exactly the same as the one from Canon that costs 4 times as much. There is a metal adapter available like some reviewers have stated, but the quality doesn't seem to be there.

I don't know how this compares to Canon's OEM adapter ring as they were 'sold out' when I recently purchased my SX 50 IS.That being said, Bower is a good name in photographic accessories so you really can't go wrong.My one drawback is that it's made of plastic. I would have expected metal, perhaps. On the other hand, if you accidentally knock the lens against something this would probably 'break away' easily before causing extensive damage to the lens. If it were made of metal, I believe the lens could accidentally be damaged if it didn't have this ability.You actually NEED this adapter for your SX 50 IS camera if you want to attach filters and lens hoods to the camera.11/19/2015 UpdateI had to add this because what I thought could happen in my original review DID HAPPEN...but that's GOOD!As I thought might happen I did drop my camera (SX 50) AND the adapter ring broke. However, the lens and camera were undamaged as it broke away as expected. I'm confident that because it broke away my camera & lens were not hurt. I think that if it has been a metal adapter ring it would have transferred the impact to the camera and/or lens and I'd have to get that repaired or use it as a paperweight.So, I bought it again. I think it's less now than when I first bought it.

The price was right on this but it will not stay on the camera. Look at it and it falls off. I had purchased a genuine Canon version for an earlier camera that did not do this. I would spend the money on a better product. This one is useless

fits my SX60, but be careful, it is difficult to install. I probably made a mistake by using a lens hood with it, as it broke.

great tool and fast service

Not too much one can say about an item such as an adapter ring. It fits perfectly, and holds any filters securely. Recommended!

It seems to work for me