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<blockquote data-quote="hark" data-source="post: 546616" data-attributes="member: 13196">You can buy a CPL filter to fit the largest diameter lens you own. If your largest lens takes a 67mm filter, then that would be the one to get. Then you can get step-up rings to fit the filter to smaller lenses. A step-up ring would fit the size of the filter and have a second thread on it to fit it to a smaller lens. 52→67 would work for your example. You just want to be sure to get step-up rings and not step-down rings. The latter won't fit properly plus they cause vignetting. Here is a Sensei brand ring that would fit. I have at least one by this company, and it is made very well. It is also slimmer which is preferable over one that is thicker. The down side to using step-up rings is that your lens hood won't fit onto the lens when using step-up rings, but you can easily shield the sun from the lens with your hand (or a hat if you wear one). The alternative is to buy CPL's to fit every size lens you own which is what I do. Initially when I started out, I bought a large filter and used step-up rings to save money.<a href="http://www.bhphotovideo.com/c/product/809616-REG/Sensei_sur5267_52_67mm_Step_Up_Ring.html" target="_blank">Sensei 52-67mm Step-Up Ring SUR-5267 B&amp;H Photo Video</a>[ATTACH=full]205668[/ATTACH]</blockquote>

[QUOTE="hark, post: 546616, member: 13196"] You can buy a CPL filter to fit the largest diameter lens you own. If your largest lens takes a 67mm filter, then that would be the one to get. Then you can get step-up rings to fit the filter to smaller lenses. A step-up ring would fit the size of the filter and have a second thread on it to fit it to a smaller lens. 52→67 would work for your example. You just want to be sure to get [I][B]step-up rings[/B][/I] and not step-down rings. The latter won't fit properly plus they cause vignetting. Here is a Sensei brand ring that would fit. I have at least one by this company, and it is made very well. It is also slimmer which is preferable over one that is thicker. The down side to using step-up rings is that your lens hood won't fit onto the lens when using step-up rings, but you can easily shield the sun from the lens with your hand (or a hat if you wear one). The alternative is to buy CPL's to fit every size lens you own which is what I do. Initially when I started out, I bought a large filter and used step-up rings to save money. [URL="http://www.bhphotovideo.com/c/product/809616-REG/Sensei_sur5267_52_67mm_Step_Up_Ring.html"]Sensei 52-67mm Step-Up Ring SUR-5267 B&H Photo Video[/URL] [ATTACH type="full" width="60%"]205668._xfImport[/ATTACH] [/QUOTE]

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