In general, polarizing filters on ultra-wide-angle lenses are of limited
usefulness because the band of polarization exhibited by the sky is much
narrower than the FOV of the lens. You end up with a striped sky.
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>Subject: RE: [OM] Questions on Tamron 17mm
> From: Bernard Frangoulis <bcf@xxxxxxxxx>
> Date: Mon, 28 Jul 2003 19:25:34 +0200
> To: olympus@xxxxxxxxxxxxxxx
>
>>I don't have the B6FH at hand to measure, but my guess is that the bigger
>>petals are at least 2cm deep. Here is a picture of one FS you-know-where
>>http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=2942540976&category=30060
>
>I'm not sure this is the right hood, the add says the hood is for a
>82mm diameter lens, and mine is less wide than that (even a 72mm cap
>is too wide). Is it not the B6FH hood, for the newer Tamron 17mm
>model? Anyway the seller ships to United States only - I'm in France.
>
>>It looks like you are right Bernard - it's just a gizmo to get the lens cap
>>to fit! The Tamron website lists filter sizes for all its lenses - except
>>the 51B 17mm, for which there is no mention of a filter size!
>
>So, no polarizing filter for this lens... :-(
>
>Thanks again Piers!
>
>Bernard
>
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