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11-03-2011, 06:37 PM   #1
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K-r lens filter sizes

1st off i just wanted to say Hi and i just got (its still in the mail) a k-r camera and i have a silly question. I am looking to get some lens filers for it. Does this camera need a certain size filter to fit on the lens? Or will any filter that is for an 18-55mm lens fit? I know I know. silly question. But i haven't taken pictures in a VERY long time.

11-03-2011, 06:43 PM   #2
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The 18-55 refers to the focal length, not the filter size. Iirc the filter size for that lens is 52mm, but each lens can be different depending on length and max aperture. For instance, I believe the 55-300 is 55mm.
11-03-2011, 06:47 PM   #3
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Ok thanks for the info.
11-03-2011, 06:54 PM   #4
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The filter size for the 18-55mm is 52mm and for the 55-300mm it's 58mm.

The info can be viewed in our lens database:
Pentax-DA 55-300mm F4-5.8 ED Reviews - DA Zoom Lenses - Pentax Lens Reviews & Lens Database


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11-04-2011, 06:17 AM   #5
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Filter size is generally indicated by a Greek capital phi (Φ) followed by the size in mm (e.g. Φ52) somewhere on the lens - frequently the rim of the front element.

Just a warning: before you go blowing money on 52mm filters for the DAL 18-55, ask yourself whether you're intending to upgrade it in the near future. None of the typical upgrade zooms (DA 16-45, 17-70, Sigma 17-70, Tamron 17-50, etc.) use 52mm filters and neither does, say, the DA 35 F2.4 prime. Given that you're only ever going to use one neutral density or polarizing filter at a time, filter size could be something that influences your purchasing decision - buying filters to cover multiple barrel sizes gets really expensive really quickly.

67mm seems to be a size used by a good range of useful / desirable zoom lenses: DA 16-45 F4, DA 17-70 F4, Tamron 17-50 F2.8, DA* 50-135 F2.8, DA* 60-250 F4. Alternatively, if you're lusting after a set of limited primes, they all seem to use a filter size of 49mm.
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