How do I know if these Hoya CP's are good?

[pilsburypie]

Been reading about Circular polarisers and the excellent sticky thread. I will soon have a 50d with 17-85 lens which I believe to be 67mm thread. I don't have much more than £50 to spend on one, but I want to avoid the crap. Are there any differences between these ones? Are all Hoya CP's good or do they make budget ones best avoided?

http://www.digitalrev.com/en/hoya-67mm-circular-polarizer-236.html
http://www.overstock.com/Electronics/Hoya-67mm-Circular-Polarizer-Glass-Filter/2505386/product.html?cid=133635
http://www.microglobe.co.uk/catalog/product_info.php?pName=hoya-67mm-g-series-circular-polarizing-filter
http://www.jessops.com/online.store/categories/Cameras%20and%20Lenses/Filters/products/Hoya/Circular%20Polarising%2067mm-11480/Show.html

Mark

[bryank930]

The filters in the green box are not multi-coated filters and should be avoided IMO. Look for something that says MRC or multi-coated on it, or even sometimes 'digital'.

[Jon]

In Hoya filters, look for he ones that are S-HMC. Those are their best multicoated ones.

[Wilt]

The filters in the green box are not multi-coated filters and should be avoided IMO. Look for something that says MRC or multi-coated on it, or even sometimes 'digital'.

^^

The Blue Box is the 'Hoya Standard' line, with single coat for about 94-95% transmission (Green box is uncoated according to 2filters...is that the 'Hoya sub-Standard' line ? :wink: ).

At the minimum...Hoya HMC or Pro Digital, then HD, then SHMC best