The 62mm circular polarizing filter is the size for select Pentax AF lenses, including the Pentax AF 28-105mm f/4.0-5.6 (although not the AL version, which is 58mm). I bought this filter for my AF 28-105 as it is my general “walkaround” lens on a Pentax K100D. For those that don’t know (new to SLR), you need a “circular” polarizing filter on auto-focus lenses, as a “linear” polarizing filter will prevent autofocus from working. Adding this filter does bring out the rich colors of the sky and water without breaking the bank.
A prior reviewer complained it didn’t do much for him/her, but circular polarizers are largely for reducing reflection (although, quite possibly, sometimes increasing refraction), so it’s really only useful for the sky, water and reducing other light-based reflections. I don’t know what the other reviewer meant by it resulting in “soft” images, although I have a Tamron 28-300mm 10.7x “superzoom” and it is soft on its own (and junk compared lower zooms, let alone prime, lenses).
Now be aware that this inexpensive filter is not most ideally transparent and the additional f-stops this filter will add will limit your capabilities. If you’re trying to capture such motion and want a better filter, you’re already spending more money for a faster lens as well (or you should be). If not, then this is the filter you want, at the right price. I give it four (4) stars because it is a great value for still or slower motion photography when you have inexpensive lenses where speed is not your consideration, but cost is.
Again, remember, you need “circular” polarizing filters for auto-focus lenses, or auto-focus will not work (such as with “linear” ones).
Help answer the question about Polarized Cpl
Help in choosing polarizing filters?
I'm looking to buy a polarizing filter for my Nikon D3000....I've Polarized Cpl seen some ( Hoya is the brand I was thinking ) with different words listed in the title...some specify digital, some CPL, etc....what do I need to look for in the title? Thanks!
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