Instruction: Answer the given question using the supporting document.

Input:
Question: Is it a HMC UV(C) or HMC UV(0)? can you clarify? The title says it's UV(0) but the description says it's UV(c)
Document: This item is not labeled correctly. I ordered this item hoping it would be a UV-0, which I know is in part my fault. However, it would have saved me money and time if it were labeled correctly. It is actually Hoya HMC UV(C). This piece of glass has way worse flaring that another filter I purchased for a few bucks more.
The Multi coat is a layer over the filter. It's not manufactured into the glass. This is a UV(c) Filter not the UV(0) which has the anti glare manufactured into the glass.Point is, I don't notice a difference yet and it does what its supposed to do with Hoya Quality.
this filter received the highest rating of all UV filters at [...]- that is the Hoya HMC UV HMC (O) series (see actual test to view images on this lenstip site). There has been some mystery questioning what the difference is from the (O) to the (C). I called Hoya to inquire and get the latest:  I just spoke with Glenn in support at Hoya regarding this same issue (O) vs (C).
The product is just as it says in the description on the site. Its clear and a great multi-coated filter to have.And it do not affect speed of lens.
I bought this for myCanon EOS Rebel T2i 18 MP CMOS APS-C Digital SLR Camera with 3.0-Inch LCD (Body Only)and it is a great quality product and gets the job well done. It is great to have as a lens protector! My only gripe is that the lens cap doesn't fit fully on the filter as it did the lens, but it's only a small thing.
I got this mainly as a lens protector. Its a Hoya UV(c) slim frame:[...]Works as expected, up to Hoya standards
Pros: Protects LensCons: Only 1 function, PriceReview: I think I got hosed, I don't think that an extra expensive HMC UV filter can be that different from cheap ones. Erring on the side of caution, you can expect that it doesn't add any color cast, or vignetting, but com'on, its a piece of glass.Rationalization: Tell yourself that Canon/Nikon/Zeiss etc.
I hope I read other reviews about multicoated UV filter much early. I use a normal ... UV Haze filter on my kit lens since the first day, 2 years ago! I can take some sharp pictures, but always feel a masking over the picture and have to use software to touch up. To attack glare I even bought a flower shaped hood. With this Hoya HMC zipped on, I can tell it's more clear through now. Adorama standard shipping is lightning fast.
I was finally able to get it off without breaking my lens.The other bad thing about it is the lens cover cap doesn't clip in all the way, like a previous review mentioned. I didn't think it was a big deal until I saw what it was like in person. See images to see what I mean.All in all I would rather just fork out the extra money and get the same filter I already have or try and find a UV-0 like I was hoping this was.
I had asked what the "O" or Zero represented and also the (C). He stated Japan has never advised him as to what the symbols reflected. I asked is it possible the (O) is for Original and the (C) is for compact? He stated he had never heard that before and probably just a rumour. You can call any time for more info or verification at [...] - I called their [...] phone number.
Answer: Sorry, HMC UVC