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#1
February 10th 09, 03:09 AM
posted to rec.photo.digital.slr-systems
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Filter choice
Rob wrote:
The polarising filter seems very interesting, and I'll doubtless have plenty of experimentation ahead. However, at maximum zoom (on an 18-200mm Canon lens) the focus is very poor. Could this be down to the filter quality? Or polarising? The 18-200 is f/5.6 at the long end, and you're cutting more than another full stop of light with the filter. There just won't be enough light left for the autofocus system to work very well. -- Jeremy Nixon | address in header is valid (formerly ) http://www.flickr.com/photos/100mph/ 
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