damdannyboy wrote:
I have a inexpensive Bower CPL right at the moment and it does the job, but it's subject to lens flairs! I've been looking at the B&H web site and the list long, three pages and prices are $5.99 to $300 plus. what's the real deal, I'm looking for some advice and recommendations.
Thanks
damdannyboy
A couple of folks have made useful comments here, and it is true that the flare you show in this shot is unavoidable due to the angle of the sun to your lens. In fact, the flare you see is not from the filter but from the lens itself - each of those little bright spots is due to a glass/air surface from the groups of lens elements inside the lens itself. In other words, for this shot even without the filter you would have gotten almost all of those flare spots.
But now, to answer your actual question, namely, what's the deal with the broad range in CPL prices:
Like anything else, CPLs can be made of differing qualities. The flatness of the glass, the performance of the polarizing layer, the material used for the filter ring (brass or plastic) and the amount and type of lens coatings on the filter as well as the possible prestige of the brand all play roles in the price charged. Some manufacturers, like Hoya, offer various "flavors" of their filters, low priced budget models up to high end more expensive - for instance, in the the 77MM diameter size Hoya has CPLs from $60 to $200, 9 in all (at B&H prices). The pricier ones have better coatings (which will eliminate more glare, though not in the situation you actually posted) and better construction. You'll also note there are "super thin" versions; these are designed to be used on super-wide angle lenses where the thickness of the CPL filter will cause some vignetting (cutting light off at the corners). These "thin" versions of CPLs generally don't have front threads (so no snap-on lens cap) to minimize the depth of the filter mount (remember CPL filter rings are two-part, to allow for the filter part to be rotated while not becoming unscrewed from the lens).
After that, some manufacturers add a warming filter within the CPL to eliminate any need to use another filter behind the CPL (and make for more layers of air/glass interface which is where glare happens). And of course, there's branding - one filter might be completely identical to another one but the fancier brand on the label demands a higher price.
Singh-Ray, B+W, and Heliopan are often considered the highest-end brands; Hoya and Tiffen make versions that are anywhere from lower proved to mid-range or better. More multi-coatings are better at flare issues (again, not for your example above however), metal rings are better than plastic in that they are more robust and won't cross-thread as easily, and better glass and flatness are, well, just better. Noticeably better becomes subjective; some folks think their kit lenses are terrific while others are staunchly in the "prime lenses only for me!" camp - YMMV. As to whether it's worth the price difference, that's another subject about which we will no doubt see opinions galore.