I have both the 52 and 58mm circular polarizers from Tiffen and they both work fantastically. The outer ring spins easily and smoothly, and the filter doesn't reduce the image quality one bit. This is a must have for taking outdoor pictures as it really makes clouds pop and cleans up reflections. Want to get a shot through a glass window? Use this filter to prevent unwanted reflections from getting in the way. Like your framing and exposure, but getting blown out reflections in that lake? You'll lose a stop of light, but it's worth it to get rid of those stray sunbeams in the water.I've taken them both on numerous hikes and in some fairly dangerous conditions. I've thrown them in my camera bag without much regard to their safety, and yet they work fine without any scratches. For the money, Tiffen is great.

Initially I wanted the official canon adapter, however these were out of stock with no date for restocking so I bought this instead. Although I can’t compare this generic item to the branded Canon adapter, I have to say that so far I have been really impressed with what it does. All my EF lenses (Canon 100-400l mk2, Canon 100 macro, Sigma 150-600, Sigma 150 macro) work perfectly with all functions operating as I would expect. At at least half the price of the Canon adapter, I have no hesitation in recommending this item.

Just received & tested ASAP: photos taken with and without CPL filter. For my camera Canon Powershot SX40HS I strongly recommend the 52-58 step-up adapter the bayonet style not the threaded one (I purchased and tested both): It's easy and faster to install/remove. Once fixed the CPL on the 52-58 step-up adapter I'll leave them together always. This will prevent thread cuts and misalignmentsCPL usage - It makes the difference even I was expecting a little bit more cutting of the reflexions but for the money spent it's very good. Tested at 90 degres (as all indicate) vs sunlight direction and the stones are visible in the pond due to reflexions cut at water surface. As you increase the angle the more effective it is: it's doing the job! At the beginning you need a little experience till you find the max open and max closed positions (CPL ring rotation) then you play with the ring for effects. I'm looking forward to enjoy this CPL filter furthermore for better pictures.

I couldn't get over all the stuff you get from this and only for around $52. It's honestly too good to be true and how well it works with the green screen is even more amazing.

I have not yet once sat on my tasty 52 year old spheres. Thanks for keeping them in tact so I can give it to my wife over and over! Product works perfectly!

Say what you will about the Leica price premium but this is an amazing little monocular. I've been using it for about 6 months now and don't know how I ever lived without it. I'm a photographer and this fits nicely in my camera bag, to be used for spotting animals and people to approach and photograph. I also take it with me on extended mountain treks, where it is incredibly useful. The close-up lens is nice to have, but I find myself using it only infrequently, mostly because the case, where it is stored, is so bulky I tend to leave it home. It gets 4 stars instead of 5 due to the bulkiness of the case, which doesn't fit the lanyard, and factoring in price/value.But why the Leica? Because of the clarity and brightness of the image and the durability and build of the product. It's survived 4 foot falls onto dirt without damage. It's been inundated with rain and snow. I've let everybody and their uncle use the thing and it's still like new. The initial stiffness in the focus ring has loosened up. It's possible to shoot through the monocular using my Sony RX100M3 camera, or any smaller point-and-shoot. Just put the zoom on full and focus on infinity, then place the monocular over the lens. The results aren't spectacular, but it'll do as a long telephoto in a pinch.I look forward to decades of use of this investment, and eventually I'll pass it on to one of my kids.

I purchased a Canon FD to Leica M adapter in order to get some more use out of my 17mm Canon lens. I’m pretty impressed with it so far. It seems considerably better quality than the cheap imported adapters, and not as expensive as a Novoflex. The lens hooks up solid and it feels solid on the camera body. I will most likely try some of their other adapters as necessary.

I have tried two different macro lens and this is the best by far