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Title: its not invincible, but why would it be?
Review: only reason i didnt give a fill 5 stars was because while riding an airplane in my carry-on camera backpack, the filter cracked right across with no explanation while still on my sigma 70-300mm, im thinking it might have been from the pressure it the cabin fluctuating? i dont know, but it cracked with out even being physically touched by anything, so yeah, that was lame. loosen the filter before boarding airplanes to avoid the pressure differentiation behind the filter, and you should be good.
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