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<p style="margin-bottom: 0in;"]That's pretty much top dog as far as
filters go. I would recommend going ahead and buying the slim version
because a full frame sensor camera might be in you future where its
better to spend a little more now then turn around and buy a whole
new slim filter in the future. Filters are one of those things
that you can keep forever so try to keep future needs in mind.
Cameras will continue to become more affordable where canon might
twist your arm to purchase a bigger sensor camera. About five
years ago I sprung for the high dollar Hoyapolarizer for the
70-200mm f/4 lens thinking that I would never get the chance to own
the 2.8 version. Well after a 5 months I sold that lens to get the
2.8 version and had no need for a 67mm filter. Sold it on
another photo sharing website to a lucky buyer that got a great deal
on a perfect 150 dollar filter. I then had to turn around and buy the
$170.00 82mm B+W slim C-Pol plus a step-up adapter ring so that I
could use it on my other 77mm lenses. Step up ring adapter was 8
dollars and now I should be covered well into the future.