[quote=ucodegen]It is hard to tell which of your listed ones give you the best price/perf. They are not using the names of the filters that Hoya is actually using. If they were, I could compare them. Hoya has 4 styles of coated filters. In the size of 67mm, they have have 3 of the types.
Standard, HMC and S-HMC(same as HMC but slim profile for wide angle lens to prevent vignetting.)
I tracked down the size of the filter for both lens. They both use a 67mm. The problem is that the wide angle will probably need a slim profile or you should use a 67mm/72mm step ring and go to a larger size. You will not be able to use the lens hood on the Tamron 17/50 with the filter on if the filter has a step ring. On the other hand, you will be able to use full wide angle on the lens with the filter without vignetting when using the step ring design.
With Amazon, I don’t know what specific filters are being listed because they don’t use manufacturers part numbers. The ‘model number’ does not trace to anything.
Try Adorama and you can use their ‘filtering’ ability to select specific sizes and manufacturers. They also list manufacturer’s model numbers. What I can determine from Hoyas part numbers.. the format is the following: {type_of_coatings/family}{size}{type of filter} {type of coatings/family} maps to:
A – Multicoat
B – Hard multicoat
X – Super Multicoat – thin profile
XD – Pro 1 line, multicoat.
XHD – Super Multicoat with Hardened glass.
G – Standard {size} will be size in mm. {type of filter} would map to
PL – Linear Polarizer
CRPL – Circular Polarizer.
Therefore a G67CRPL will be the ‘standard 67mm circular polarizer’, which is single coated. This is for Hoya.. other manufacturers are different.[/quote]
Wow, thanks! So I guess especially for the wide angle, putting a polarizer on top of a UV filter is a no-no due to vignetting… I haven’t noticed vignetting problem with my B+W filter, and it’s not a low-profile one…Maybe I’m just not looking too hard.
