67mm circular polarizer

Where would be a good place to purchase a uv filter and polarizer for the 70-200mm f/4 I have on the way...?

I found some on B&H but I guess my question now is why are some so expensive? Won't a $20 polarizer be ok?

This is one case where you get what you pay for. Would you buy K-Mart tires for your Ferrari? You want to put the best filter that you can afford on your lenses.

Why would you want to stick a piece of $20 glass in front of a $600 lens? At least split the difference between the $20 cheapie, and the $150 B+W. I got a Hoya super multi-coated for about $60.

Please read this (http://www.luminous-landscape.com/columns/​sm-feb-05.shtml) about filters. The article is basically about filters used for "protection", but you will read about why you want the best quality available for any filter you choose to use.

I went through a polarizer experience with my EF 70~200 f/2.8 IS USM... use the link:

http://www.dcresource.​com/forums/showthread.​php?t=21058

Go too cheap and you threaten your focusing...

Hoya, man... reasonably priced and the best part... it works!

The more expensive ones are just better quality and clarity...i had the choice between a $45 one or an $80 one, i picked the $80 one - why? I learnt my lesson with buying the cheaper way plenty of times - i always end up spending more money to make up for what i lost in buying cheaply beforehand!

oh and try ANY photo store in your area - they should ALL have them

I know it may cost a little more, but you might want to think about getting your filter to fit the largest lens you think you'll ever buy then get step down rings for your other lenses. I didn't and it was a mistake. I bought polarizer and nd for what I had at the time at 58mm size now I have a 77mm and looking at getting the 70-200 f/4L like you at 67mm filter.

In other words if I'd bought the polarizer, nd at 77mm first, then I'd only have to get step down rings to fit my 58mm and 67mm. Save money in the long run.

One of the more serious issues or drawbacks, which no one ever seems to mention, with step-up rings and "bigger-than-the-lens" filters is that you can no longer use your lens hood. To me, this is a serious problem when working outdoors or with side-lighting, as you get "ghosting" and "lens flares"... because the light is no longer 'blocked' from striking the lens across the face of the filter.

Be careful in this decision... it has hidden issues... at first. Of course, if you don't use a lens hood... it matters not.

Personally, I have a proper-sized UV on every lens, as protection... and at least one polarizer for every filter ring size I have (which seems to be all of them, from 49mm thru 86mm). This way, I can always use my lens hood.

I have also recently found that you can get away with the cheaper polarizers (under $30) for lens that are less than 50mm in focal lengths, but when going to telephoto, these cheaper ones can really play havok with your AF. Believe me when I say, "Spend the few extra bucks for a Hoya CP"... and then you should be shooting very clearly focused shots. The advice is free.

hey, check this out!

http://www.shopping.co​m …mm_f_2_8_ED_D_A​F_Lens_572

i was thinkin of a way to get around this hood problem that AmericanFirst brought up. maybe this will work? i think its a hodd u 'screw' in.. not totaly sure

Another thing - I keep a polariser on each lens when I am switching. Having to change filters as well would make a quick lens change very difficult.

You need to spend some money though. B&W are fantastic.

Graham